spectro-l : Messages : 12643-12672 of 14150

Tue, 15 May 2012 01:05:19 -0400

-- Fran�ois Teyssier
www.astronomie-amateur.fr

AAVSO Special Notice #280

HST UV spectroscopy observations of S Dor scheduled
May 9, 2012

We have been informed by Dr. Noel Richardson, Georgia State 
University, that the UV spectroscopy observations of S Dor to be 
made with the Hubble Space Telescope have been scheduled for 

2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.

During the 24 hours prior to and following the HST observations, 
as well as during them, please increase your BVRI (or as many of 
these filters as you can) coverage from once per night to twice 
per night. Afterwards, please return to nightly observations until 
further notice.

The HST observations of the luminous blue variable prototype S Dor 
are part of the multiwavelength, multisite campaign described in 
AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453). 
As mentioned there, the campaign is to study the photosphere of 
this star. Optical spectroscopy from CTIO and an amateur in 
Australia have already been obtained successfully. Approval is 
still pending for near-IR spectroscopy from SOAR and mid-IR 
photometry from Gemini.

It is important to continue the excellent monitoring you have been
carrying out. Your observations are not only very interesting but 
also necessary to correlate all of the observations and interpret 
the variability taking place in S Dor. S Dor is particularly 
interesting at present because its current state allows the 
deepest look into its photosphere since the 1960s, leading to a 
better understanding of its stellar and wind properties. To quote 
Dr. Richardson, "...the types of variability we are really 
wanting to probe are the long term trends and the decline to 
optical minimum it is going through."

Visual and photometric observations are requested on a nightly or 
twice-nightly basis as described above. BVRI photometry would be 
ideal, but any filter(s) would be very helpful. According to 
observations in the AAVSO International Database, S Dor has 
brightened from visual magnitude ~10.4 in February 2012 to its 
current value of 10.0. Its decline from visual magnitude 
9.2 began in 2006, with a more rapid decline starting in early 
2010.

Coordinates: RA = 05 18 14.35  Dec = -69 15 01.1 (2000.0)

Charts may be created using VSP (http://www.aavso.org/vsp).

Please submit observations to the AAVSO International Database 
using the name S DOR.

This campaign is also described on the AAVSO Observing Campaigns 
page.

Your observations are key to the success of this campaign. If you 
have been observing S Dor, please continue. If you have not, and 
if you can observe this far south, please add S Dor to your 
nightly list. Many thanks!

This AAVSO Special Notice was prepared by Elizabeth O. Waagen.

---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

AAVSO Special Notice #280

HST UV spectroscopy observations of S Dor scheduled
May 9, 2012

We have been informed by Dr. Noel Richardson, Georgia State 
University, that the UV spectroscopy observations of S Dor to be 
made with the Hubble Space Telescope have been scheduled for 

2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.

During the 24 hours prior to and following the HST observations, 
as well as during them, please increase your BVRI (or as many of 
these filters as you can) coverage from once per night to twice 
per night. Afterwards, please return to nightly observations until 
further notice.

The HST observations of the luminous blue variable prototype S Dor 
are part of the multiwavelength, multisite campaign described in 
AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453). 
As mentioned there, the campaign is to study the photosphere of 
this star. Optical spectroscopy from CTIO and an amateur in 
Australia have already been obtained successfully. Approval is 
still pending for near-IR spectroscopy from SOAR and mid-IR 
photometry from Gemini.

It is important to continue the excellent monitoring you have been
carrying out. Your observations are not only very interesting but 
also necessary to correlate all of the observations and interpret 
the variability taking place in S Dor. S Dor is particularly 
interesting at present because its current state allows the 
deepest look into its photosphere since the 1960s, leading to a 
better understanding of its stellar and wind properties. To quote 
Dr. Richardson, "...the types of variability we are really 
wanting to probe are the long term trends and the decline to 
optical minimum it is going through."

Visual and photometric observations are requested on a nightly or 
twice-nightly basis as described above. BVRI photometry would be 
ideal, but any filter(s) would be very helpful. According to 
observations in the AAVSO International Database, S Dor has 
brightened from visual magnitude ~10.4 in February 2012 to its 
current value of 10.0. Its decline from visual magnitude 
9.2 began in 2006, with a more rapid decline starting in early 
2010.

Coordinates: RA = 05 18 14.35  Dec = -69 15 01.1 (2000.0)

Charts may be created using VSP (http://www.aavso.org/vsp).

Please submit observations to the AAVSO International Database 
using the name S DOR.

This campaign is also described on the AAVSO Observing Campaigns 
page.

Your observations are key to the success of this campaign. If you 
have been observing S Dor, please continue. If you have not, and 
if you can observe this far south, please add S Dor to your 
nightly list. Many thanks!

This AAVSO Special Notice was prepared by Elizabeth O. Waagen.

---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

-- François Teyssier
www.astronomie-amateur.fr

AAVSO Special Notice #280
HST UV spectroscopy observations of S Dor scheduled
May 9, 2012
We have been informed by Dr. Noel Richardson, Georgia State University, that the UV spectroscopy observations of S Dor to be made with the Hubble Space Telescope have been scheduled for 2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.
During the 24 hours prior to and following the HST observations, as well as during them, please increase your BVRI (or as many of these filters as you can) coverage from once per night to twice per night. Afterwards, please return to nightly observations until further notice.
The HST observations of the luminous blue variable prototype S Dor are part of the multiwavelength, multisite campaign described in AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453). As mentioned there, the campaign is to study the photosphere of this star. Optical spectroscopy from CTIO and an amateur in Australia have already been obtained successfully. Approval is still pending for near-IR spectroscopy from SOAR and mid-IR photometry from Gemini.
It is important to continue the excellent monitoring you have been
carrying out. Your observations are not only very interesting but also necessary to correlate all of the observations and interpret the variability taking place in S Dor. S Dor is particularly interesting at present because its current state allows the deepest look into its photosphere since the 1960s, leading to a better understanding of its stellar and wind properties. To quote Dr. Richardson, "...the types of variability we are really wanting to probe are the long term trends and the decline to optical minimum it is going through."
Visual and photometric observations are requested on a nightly or twice-nightly basis as described above. BVRI photometry would be ideal, but any filter(s) would be very helpful. According to observations in the AAVSO International Database, S Dor has brightened from visual magnitude ~10.4 in February 2012 to its current value of 10.0. Its decline from visual magnitude 9.2 began in 2006, with a more rapid decline starting in early 2010.
Coordinates: RA = 05 18 14.35 Dec = -69 15 01.1 (2000.0)
Charts may be created using VSP (http://www.aavso.org/vsp).
Please submit observations to the AAVSO International Database using the name S DOR.
This campaign is also described on the AAVSO Observing Campaigns page.
Your observations are key to the success of this campaign. If you have been observing S Dor, please continue. If you have not, and if you can observe this far south, please add S Dor to your nightly list. Many thanks!
This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/
Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

-- François Teyssier
www.astronomie-amateur.fr

AAVSO Special Notice #280
HST UV spectroscopy observations of S Dor scheduled
May 9, 2012
We have been informed by Dr. Noel Richardson, Georgia State University, that the UV spectroscopy observations of S Dor to be made with the Hubble Space Telescope have been scheduled for 2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.
During the 24 hours prior to and following the HST observations, as well as during them, please increase your BVRI (or as many of these filters as you can) coverage from once per night to twice per night. Afterwards, please return to nightly observations until further notice.
The HST observations of the luminous blue variable prototype S Dor are part of the multiwavelength, multisite campaign described in AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453). As mentioned there, the campaign is to study the photosphere of this star. Optical spectroscopy from CTIO and an amateur in Australia have already been obtained successfully. Approval is still pending for near-IR spectroscopy from SOAR and mid-IR photometry from Gemini.
It is important to continue the excellent monitoring you have been
carrying out. Your observations are not only very interesting but also necessary to correlate all of the observations and interpret the variability taking place in S Dor. S Dor is particularly interesting at present because its current state allows the deepest look into its photosphere since the 1960s, leading to a better understanding of its stellar and wind properties. To quote Dr. Richardson, "...the types of variability we are really wanting to probe are the long term trends and the decline to optical minimum it is going through."
Visual and photometric observations are requested on a nightly or twice-nightly basis as described above. BVRI photometry would be ideal, but any filter(s) would be very helpful. According to observations in the AAVSO International Database, S Dor has brightened from visual magnitude ~10.4 in February 2012 to its current value of 10.0. Its decline from visual magnitude 9.2 began in 2006, with a more rapid decline starting in early 2010.
Coordinates: RA = 05 18 14.35 Dec = -69 15 01.1 (2000.0)
Charts may be created using VSP (http://www.aavso.org/vsp).
Please submit observations to the AAVSO International Database using the name S DOR.
This campaign is also described on the AAVSO Observing Campaigns page.
Your observations are key to the success of this campaign. If you have been observing S Dor, please continue. If you have not, and if you can observe this far south, please add S Dor to your nightly list. Many thanks!
This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/
Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

-- François Teyssier
www.astronomie-amateur.fr

-- Olivier Thizy
Shelyak Instruments
Manufacturing: 73, rue de Chartreuse, 38420 Le Versoud, France
Headquarter: Les Roussets, 38420 Revel, France
Phone: +33.(0)4.76.41.36.81
Mobile: +33.(0)6.89.92.74.23
Web: http://www.shelyak.com
...vous ne verrez plus les étoiles comme avant !
AAVSO Special Notice #279

Request for monitoring of SS Cygni in support of European VLBI  radio observations
May 8, 2012

As mentioned in AAVSO Alert Notice 445 in August 2011 and AAVSO 
Special Notice #258 in October 2011, Dr. James Miller-Jones 
(International Centre for Radio Astronomy Research, Curtin 
University, Perth, Western Australia) and colleagues have a 
multiwavelength campaign on the dwarf nova SS Cyg underway as a 
follow-up to their very successful multiwavelength campaign on 
SS Cyg in 2010 April (see AAVSO Special Notices #204 and 206 
and the related information page).

Earlier in this follow-up campaign, thanks to your excellent 
coverage and immediate notification to Headquarters of SS Cyg's 
outburst last August, Dr. Miller-Jones and colleagues were able 
to obtain excellent observations.

They have more time available, however, and want to observe SS Cyg 
again.

THE NEXT POSSIBLE OBSERVING WINDOW IS 2012 MAY 15-16.

with subsequent 2012 windows of:
June 19-20
September 17-18
October 9-10
November 13-14
December 4-5

Dr. Miller-Jones says, "Ideally we would like to know the state of 
SS Cyg (particularly whether or not it is going into outburst) a 
few days before each of these dates, to give us time to alert the 
schedulers and get on the telescope if appropriate. We would be 
extremely grateful for any assistance the AAVSO could provide.â€

SS Cyg is the class prototype of the dwarf novae, and the brightest 
dwarf nova in our skies. In quiescence, SS Cyg varies around V=12.0,
and will typically reach V=8.0 at maximum, although anomalous weak 
outbursts are sometimes seen. SS Cyg last went into outburst 2012 
March 21 (JD 2456007.6618, 11.6, F. Vohla; 2456007.64028, 11.2, 
J. Speil; 2455797.9875, 11.2); the outburst was a narrow one, 
lasting 11 days. The next outburst may occur at any time. 
Observations brighter than m(vis)=11.0 should be reported as 
quickly as possible.

Observers are asked to increase their monitoring of SS Cyg at 
least through December. Please report all observations as soon 
as is practical. In the event of an outburst, please report your 
observations as quickly as you can via WebObs, and also notify 
Dr. Matthew Templeton and Elizabeth Waagen at AAVSO Headquarters 
(matthewt@..., eowaagen@...). Visual magnitude 
estimates are a fast and effective means of monitoring SS Cyg; 
CCD observations are also useful, but please reduce your frames 
and report your data as soon as possible following an observing 
run. CCD time-series are not specifically required for this project.

Coordinates for SS Cyg:  RA 21:42:42.79  Dec +43:35:09.9  (J2000.0)

Charts for SS Cyg may be plotted using AAVSO VSP: http://www.aavso.org/vsp

This campaign is being followed on the AAVSO Observing Campaigns 
page. For more information on this project, please see Dr. 
Miller-Jones' website: http://www.astro.virginia.edu/xrb_jets

Please report all observations to the AAVSO International 
Database promptly using the name "SS CYG".

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

Dear Bernard
I can probably get low res spectra with my LISA over the next few nights. The
main problem is the low altitude and clearing the trees. It is too low by 9:30pm
local time.

Terry

--- In spectro-l@yahoogroups.com, "Bernard Heathcote" <spectrasouth@...> wrote:
>
> Hi all,
>
> I gave the wrong time coverage. The photometry and spectra data gathering
period is from 24 hours before and up to 24 hours after the HST 11 May
21:20-23:50 UT coverage, which means the nights of 11/12 and 12/13 May in
Australia ... this Friday and Saturday nights.
>
> Cheers,
> Bernard
>
>
> From: Bernard Heathcote
> Sent: Thursday, May 10, 2012 8:58 AM
> To: spectro-l@yahoogroups.com
> Subject: Re: [spectro-l] Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
>
>
>
> Hi François, and all southern spectroscopists,
>
> I think it is meant to refer to myself. Back in December I was asked by Dr
Noel Richardson if I could help support HST and CTIO with medium resolution
spectra in the red and blue zones. I told him it should not be a problem if my
rural observatory was back in action by early May. In February I advised him
that it didn’t look like the rural observatory would be operating before June
and that it would be very difficult to image it from my city location due to
trees, but would try. I was therefore a little surprised to read in a February
AAVSO alert that observation plans included “an amateur in Australia”. The
latest AAVSO alert that says spectra have already been successfully obtained by
an amateur in Australia is either an error or someone else, that I don’t know
about, is involved.
>
> If any southern observers think they can get S Dor (mag 10, in the LMC)
spectra between 11 May 21:21:55 UT and 12 May 23:55:04 UT (night of 12/13 May in
Australia) they should give it a good try. The primary  spectral ranges are
5650A-6975A and 3900A-4500A, and the 5169A FeII line if possible. Note that
H-alpha reaches 50X the continuum, so you may need two exposures in the red, one
short for H-alpha and one longer for everything else. The higher the resolution
the better, with R=2000-3000 being desirable (Lhires+600 grating), but any
spectra will be welcome by Dr Richardson. I will be trying from my city location
but doubt that the weather and trees will cooperate.
>
> Please contact me for any further information. Sorry for the very short
notice.
>
> Cheers,
> Bernard
>
>
>
> From: François Teyssier
> Sent: Thursday, May 10, 2012 5:10 AM
> To: spectro-l@yahoogroups.com
> Subject: Re: [spectro-l] Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
>
>
> Does anyone know which is the Australian amateur who makes the optical spectra
?
>
> François Teyssier
>
>
>
>
> Le 09/05/2012 21:04, François Teyssier a écrit :
>
>
>
>
>   -------- Message original -------- Sujet:  AAVSO Special Notice #280: HST UV
spectroscopy observations of S Dor scheduled
>         Date :  Wed, 9 May 2012 13:21:43 -0400
>         De :  aavso@...
>         Pour :  francois.teyssier@...
>
>
>
>
> AAVSO Special Notice #280
>
> HST UV spectroscopy observations of S Dor scheduled
> May 9, 2012
>
> We have been informed by Dr. Noel Richardson, Georgia State
> University, that the UV spectroscopy observations of S Dor to be
> made with the Hubble Space Telescope have been scheduled for
>
> 2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.
>
> During the 24 hours prior to and following the HST observations,
> as well as during them, please increase your BVRI (or as many of
> these filters as you can) coverage from once per night to twice
> per night. Afterwards, please return to nightly observations until
> further notice.
>
> The HST observations of the luminous blue variable prototype S Dor
> are part of the multiwavelength, multisite campaign described in
> AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453).
> As mentioned there, the campaign is to study the photosphere of
> this star. Optical spectroscopy from CTIO and an amateur in
> Australia have already been obtained successfully. Approval is
> still pending for near-IR spectroscopy from SOAR and mid-IR
> photometry from Gemini.
>
> It is important to continue the excellent monitoring you have been
> carrying out. Your observations are not only very interesting but
> also necessary to correlate all of the observations and interpret
> the variability taking place in S Dor. S Dor is particularly
> interesting at present because its current state allows the
> deepest look into its photosphere since the 1960s, leading to a
> better understanding of its stellar and wind properties. To quote
> Dr. Richardson, "...the types of variability we are really
> wanting to probe are the long term trends and the decline to
> optical minimum it is going through."
>
> Visual and photometric observations are requested on a nightly or
> twice-nightly basis as described above. BVRI photometry would be
> ideal, but any filter(s) would be very helpful. According to
> observations in the AAVSO International Database, S Dor has
> brightened from visual magnitude ~10.4 in February 2012 to its
> current value of 10.0. Its decline from visual magnitude
> 9.2 began in 2006, with a more rapid decline starting in early
> 2010.
>
> Coordinates: RA = 05 18 14.35  Dec = -69 15 01.1 (2000.0)
>
> Charts may be created using VSP (http://www.aavso.org/vsp).
>
> Please submit observations to the AAVSO International Database
> using the name S DOR.
>
> This campaign is also described on the AAVSO Observing Campaigns
> page.
>
> Your observations are key to the success of this campaign. If you
> have been observing S Dor, please continue. If you have not, and
> if you can observe this far south, please add S Dor to your
> nightly list. Many thanks!
>
> This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
>
>
>
>
> ---------------------------------------------------
> SUBMIT OBSERVATIONS TO THE AAVSO
>
> Information on submitting observations to the AAVSO may be found at:
> http://www.aavso.org/webobs
>
> SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
>
> A Special Notice archive is available at the following URL:
> http://www.aavso.org/special-notice-archive/
>
> Subscribing and Unsubscribing may be done at the following URL:
> http://www.aavso.org/observation-notification#specialnotices
>
>
>
>
>
> --
> François Teyssier
> www.astronomie-amateur.fr
>

Dear Bernard
I tried tonight but at 9pm it was behind the trees.
I won't et home before 8 pm tomorrow so no chance really

Terry

--- In spectro-l@yahoogroups.com, "Bernard Heathcote" <spectrasouth@...> wrote:
>
> Terry,
>
> Worth a try if you can see the star. I moved my mount today but S Dor still
hidden behind a tree for me.
>
> Cheers,
> Bernard
>
>
> From: Terry
> Sent: Thursday, May 10, 2012 8:16 PM
> To: spectro-l@yahoogroups.com
> Subject: [spectro-l] Re: Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
>
>
> Dear Bernard
> I can probably get low res spectra with my LISA over the next few nights. The
main problem is the low altitude and clearing the trees. It is too low by 9:30pm
local time.
>
> Terry
>
> --- In mailto:spectro-l%40yahoogroups.com, "Bernard Heathcote" <spectrasouth@>
wrote:
> >
> > Hi all,
> >
> > I gave the wrong time coverage. The photometry and spectra data gathering
period is from 24 hours before and up to 24 hours after the HST 11 May
21:20-23:50 UT coverage, which means the nights of 11/12 and 12/13 May in
Australia ... this Friday and Saturday nights.
> >
> > Cheers,
> > Bernard
> >
> >
> > From: Bernard Heathcote
> > Sent: Thursday, May 10, 2012 8:58 AM
> > To: mailto:spectro-l%40yahoogroups.com
> > Subject: Re: [spectro-l] Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
> >
> >
> >
> > Hi FranÃ§ois, and all southern spectroscopists,
> >
> > I think it is meant to refer to myself. Back in December I was asked by Dr
Noel Richardson if I could help support HST and CTIO with medium resolution
spectra in the red and blue zones. I told him it should not be a problem if my
rural observatory was back in action by early May. In February I advised him
that it didnât look like the rural observatory would be operating before
June and that it would be very difficult to image it from my city location due
to trees, but would try. I was therefore a little surprised to read in a
February AAVSO alert that observation plans included âan amateur in
Australiaâ. The latest AAVSO alert that says spectra have already been
successfully obtained by an amateur in Australia is either an error or someone
else, that I donât know about, is involved.
> >
> > If any southern observers think they can get S Dor (mag 10, in the LMC)
spectra between 11 May 21:21:55 UT and 12 May 23:55:04 UT (night of 12/13 May in
Australia) they should give it a good try. The primary spectral ranges are
5650A-6975A and 3900A-4500A, and the 5169A FeII line if possible. Note that
H-alpha reaches 50X the continuum, so you may need two exposures in the red, one
short for H-alpha and one longer for everything else. The higher the resolution
the better, with R=2000-3000 being desirable (Lhires+600 grating), but any
spectra will be welcome by Dr Richardson. I will be trying from my city location
but doubt that the weather and trees will cooperate.
> >
> > Please contact me for any further information. Sorry for the very short
notice.
> >
> > Cheers,
> > Bernard
> >
> >
> >
> > From: FranÃ§ois Teyssier
> > Sent: Thursday, May 10, 2012 5:10 AM
> > To: mailto:spectro-l%40yahoogroups.com
> > Subject: Re: [spectro-l] Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
> >
> >
> > Does anyone know which is the Australian amateur who makes the optical
spectra ?
> >
> > FranÃ§ois Teyssier
> >
> >
> >
> >
> > Le 09/05/2012 21:04, FranÃ§ois Teyssier a Ã©crit :
> >
> >
> >
> >
> > -------- Message original -------- Sujet: AAVSO Special Notice #280: HST UV
spectroscopy observations of S Dor scheduled
> > Date : Wed, 9 May 2012 13:21:43 -0400
> > De : aavso@
> > Pour : francois.teyssier@
> >
> >
> >
> >
> > AAVSO Special Notice #280
> >
> > HST UV spectroscopy observations of S Dor scheduled
> > May 9, 2012
> >
> > We have been informed by Dr. Noel Richardson, Georgia State
> > University, that the UV spectroscopy observations of S Dor to be
> > made with the Hubble Space Telescope have been scheduled for
> >
> > 2012 MAY 11 from 21:21:55 UT to 23:55:04 UT.
> >
> > During the 24 hours prior to and following the HST observations,
> > as well as during them, please increase your BVRI (or as many of
> > these filters as you can) coverage from once per night to twice
> > per night. Afterwards, please return to nightly observations until
> > further notice.
> >
> > The HST observations of the luminous blue variable prototype S Dor
> > are part of the multiwavelength, multisite campaign described in
> > AAVSO Alert Notice 453 (http://www.aavso.org/aavso-alert-notice-453).
> > As mentioned there, the campaign is to study the photosphere of
> > this star. Optical spectroscopy from CTIO and an amateur in
> > Australia have already been obtained successfully. Approval is
> > still pending for near-IR spectroscopy from SOAR and mid-IR
> > photometry from Gemini.
> >
> > It is important to continue the excellent monitoring you have been
> > carrying out. Your observations are not only very interesting but
> > also necessary to correlate all of the observations and interpret
> > the variability taking place in S Dor. S Dor is particularly
> > interesting at present because its current state allows the
> > deepest look into its photosphere since the 1960s, leading to a
> > better understanding of its stellar and wind properties. To quote
> > Dr. Richardson, "...the types of variability we are really
> > wanting to probe are the long term trends and the decline to
> > optical minimum it is going through."
> >
> > Visual and photometric observations are requested on a nightly or
> > twice-nightly basis as described above. BVRI photometry would be
> > ideal, but any filter(s) would be very helpful. According to
> > observations in the AAVSO International Database, S Dor has
> > brightened from visual magnitude ~10.4 in February 2012 to its
> > current value of 10.0. Its decline from visual magnitude
> > 9.2 began in 2006, with a more rapid decline starting in early
> > 2010.
> >
> > Coordinates: RA = 05 18 14.35 Dec = -69 15 01.1 (2000.0)
> >
> > Charts may be created using VSP (http://www.aavso.org/vsp).
> >
> > Please submit observations to the AAVSO International Database
> > using the name S DOR.
> >
> > This campaign is also described on the AAVSO Observing Campaigns
> > page.
> >
> > Your observations are key to the success of this campaign. If you
> > have been observing S Dor, please continue. If you have not, and
> > if you can observe this far south, please add S Dor to your
> > nightly list. Many thanks!
> >
> > This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
> >
> >
> >
> >
> > ---------------------------------------------------
> > SUBMIT OBSERVATIONS TO THE AAVSO
> >
> > Information on submitting observations to the AAVSO may be found at:
> > http://www.aavso.org/webobs
> >
> > SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
> >
> > A Special Notice archive is available at the following URL:
> > http://www.aavso.org/special-notice-archive/
> >
> > Subscribing and Unsubscribing may be done at the following URL:
> > http://www.aavso.org/observation-notification#specialnotices
> >
> >
> >
> >
> >
> > --
> > FranÃ§ois Teyssier
> > www.astronomie-amateur.fr
> >
>

Request for monitoring of SS Cygni in support of European VLBI  radio observations
May 8, 2012

As mentioned in AAVSO Alert Notice 445 in August 2011 and AAVSO 
Special Notice #258 in October 2011, Dr. James Miller-Jones 
(International Centre for Radio Astronomy Research, Curtin 
University, Perth, Western Australia) and colleagues have a 
multiwavelength campaign on the dwarf nova SS Cyg underway as a 
follow-up to their very successful multiwavelength campaign on 
SS Cyg in 2010 April (see AAVSO Special Notices #204 and 206 
and the related information page).

Earlier in this follow-up campaign, thanks to your excellent 
coverage and immediate notification to Headquarters of SS Cyg's 
outburst last August, Dr. Miller-Jones and colleagues were able 
to obtain excellent observations.

They have more time available, however, and want to observe SS Cyg 
again.

THE NEXT POSSIBLE OBSERVING WINDOW IS 2012 MAY 15-16.

with subsequent 2012 windows of:
June 19-20
September 17-18
October 9-10
November 13-14
December 4-5

Dr. Miller-Jones says, "Ideally we would like to know the state of 
SS Cyg (particularly whether or not it is going into outburst) a 
few days before each of these dates, to give us time to alert the 
schedulers and get on the telescope if appropriate. We would be 
extremely grateful for any assistance the AAVSO could provide.â€

SS Cyg is the class prototype of the dwarf novae, and the brightest 
dwarf nova in our skies. In quiescence, SS Cyg varies around V=12.0,
and will typically reach V=8.0 at maximum, although anomalous weak 
outbursts are sometimes seen. SS Cyg last went into outburst 2012 
March 21 (JD 2456007.6618, 11.6, F. Vohla; 2456007.64028, 11.2, 
J. Speil; 2455797.9875, 11.2); the outburst was a narrow one, 
lasting 11 days. The next outburst may occur at any time. 
Observations brighter than m(vis)=11.0 should be reported as 
quickly as possible.

Observers are asked to increase their monitoring of SS Cyg at 
least through December. Please report all observations as soon 
as is practical. In the event of an outburst, please report your 
observations as quickly as you can via WebObs, and also notify 
Dr. Matthew Templeton and Elizabeth Waagen at AAVSO Headquarters 
(matthewt@..., eowaagen@...). Visual magnitude 
estimates are a fast and effective means of monitoring SS Cyg; 
CCD observations are also useful, but please reduce your frames 
and report your data as soon as possible following an observing 
run. CCD time-series are not specifically required for this project.

Coordinates for SS Cyg:  RA 21:42:42.79  Dec +43:35:09.9  (J2000.0)

Charts for SS Cyg may be plotted using AAVSO VSP: http://www.aavso.org/vsp

This campaign is being followed on the AAVSO Observing Campaigns 
page. For more information on this project, please see Dr. 
Miller-Jones' website: http://www.astro.virginia.edu/xrb_jets
-- François Teyssier
www.astronomie-amateur.fr

-- François Teyssier
www.astronomie-amateur.fr

Dear All
I was able to have my scope running by just after 8pm local time tonight (Fri
11th May) and did get some data for S Dor.
I took BVRI images and then got 9 minutes of spectrum with my LISA before the
trees won.
The spectra looks ok.
So what do I do with the spectra?

Cheers

Terry

--- In spectro-l@yahoogroups.com, "Bernard Heathcote" <spectrasouth@...> wrote:
>
> Terry,
>
> Good try! Even though tomorrow night is out for you, maybe Saturday, the last
night?
>
> Cheers,
> Bernard
>
>
>

Dear Bernard
I have processed the spectra now and curiously the hydrogen lines seem to be
shifted about 5A towards the red.
I have used the same calibration files on the nova I've been following and the
hydrogen lines are correct for the nova.
Is this to be expected or is there an error?

Cheers

Terry

--- In spectro-l@yahoogroups.com, "Bernard Heathcote" <spectrasouth@...> wrote:
>
> Hi Terry,
>
> Excellent ... you had more success than me.
> Send your processed spectra to Noel Richardson at richardson@... I guess the
photometry should go to the AAVSO.
>
> Cheers,
> Bernard
>
>
> From: Terry
> Sent: Friday, May 11, 2012 10:38 PM
> To: spectro-l@yahoogroups.com
> Subject: [spectro-l] Re: Fwd: AAVSO Special Notice #280: HST UV spectroscopy
observations of S Dor scheduled
>
>
>
> Dear All
> I was able to have my scope running by just after 8pm local time tonight (Fri
11th May) and did get some data for S Dor.
> I took BVRI images and then got 9 minutes of spectrum with my LISA before the
trees won.
> The spectra looks ok.
> So what do I do with the spectra?
>
> Cheers
>
> Terry
>
> --- In mailto:spectro-l%40yahoogroups.com, "Bernard Heathcote" <spectrasouth@>
wrote:
> >
> > Terry,
> >
> > Good try! Even though tomorrow night is out for you, maybe Saturday, the
last night?
> >
> > Cheers,
> > Bernard
> >
> >
> >
>

-- François Teyssier
www.astronomie-amateur.fr

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Today's Topics:

 1. SS Cyg request for observations (Matthew Templeton)
 2. PNV J18110375-2717276 (arne)
 3. Re: PNV J18110375-2717276 (meineko)
 4. Re: PNV J18110375-2717276 (Rob Kaufman)
 5. Re: PNV J18110375-2717276 (FIDRICH Rob
ert)

Message: 1
Date: Mon, 14 May 2012 06:43:07 -0400 (EDT)
From: Matthew Templeton <matthewt@...>
To: aavso-discussion@...
Subject: [AAVSO-DIS] SS Cyg request for observations
Message-ID: <alpine.LFD.2.00.1205140641190.29871@...>
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII

Hello everyone,

We have indication that SS Cyg may have started an outburst within the 
past 12 hours. If you have observations of SS Cyg, please submit them as 
early in the day as possible. If you are still in darkness and can see SS 
Cyg, new observations would be greatly appreciated.

Clear skies,

 Matthew

Matthew Templeton, Ph.D.
Science Director
American Association of Variable Star Observers

Message: 2
Date: Mon, 14 May 2012 08:40:26 -0400
From: arne <arne@...&g
t;
To: AAVSO Discussion group <aavso-discussion@...>
Subject: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB0FD3A.5000102@...>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Another interesting possible nova event, deep in the heart of Sagittarius, but 
visible from the southern U.S. and the southern hemisphere. The discovery was 
2012-04-23 according to the CBAT transient objects confirmation page; 
description of images of it dating from February 19, 2011 are posted. It 
appeared to peak around mag 10 and is around 13th now.

This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V and 
i' images from 2012-03-27 at
http://www.aavso.org/tmp3/pnvj1811v.jpg
http://www.aavso.org/tmp3/pnvj1811i.jpg
(these are 12x12arcmin sections of the bi
gger
APASS images, with north up and 
east left.)

Taichi Kato posts on the vsnet group that there are spectra of it, indicating it 
is highly reddened and currently in the nebular stage (so late-time). I haven't 
seen where the spectra are posted. The basic reported light curve and the fact 
that Mati Morel indicates a red SPM and 2MASS star near this location would 
normally imply that this is just a mira variable, so the spectra are really 
important.

It is still bright, and probably worthy of continued monitoring, but be very 
careful of the crowding. I'll have Elizabeth put out a special notice when she 
get into the office.
Arne

Message: 3
Date: Mon, 14 May 2012 22:30:30 +0900
From: meineko <skiyotax@...>
To: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB108F6.2000807@...>
Content-Type: text/plain; charset=UTF-8; format=flowed

(2012/05/14 21:40), arne wrote:
> Taichi Kato posts on the vsnet group that there are spectra of it, 
> indicating it is highly reddened and currently in the nebular stage 
> (so late-time). I haven't seen where the spectra are posted. The basic 
> reported light curve and the fact that Mati Morel indicates a red SPM 
> and 2MASS star near this location would normally imply that this is 
> just a mira variable, so the spectra are really important. 

Yes. It should be mira variable in my first impression, too.
But it seems to be indeed classical nova.

Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif
#We have to discuss why it's progenitor is bright only in infrared.

Please check your images since 2009 or earlier.
I'm sorry but I can not write detailed information about it as it is available only in personal communication and have not announced officially yet.

 Seiichiro Kiyota
 Tsukuba, Japan

Message: 4
Date: Tue, 15 May 2012 00:01:00 +1000
From: Rob Kaufman <rob.kau@...>
To: arne <arne@...>, AAVSO Discussion group
	<aavso-discussion@...>,	vsnet-alert
	<vsnet-alert@...>
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID:
	<CAEiDP-W-dck8b1_8ymkpA+mF3B3Nn0fUDu=vGaTpeabtGPjahw@...>
Content-Type: text/plain; charset=ISO-8859-1

I have it in images going back to Sept 2010 but can't track it further back
because I was shooting at smaller image size and le
ss
resolution before
that. Quite bright in Oct 2010. As Seiichiro Kiyota says, it needs to be
tracked back further. Last night (13.567 May 2012 UT) I made it out to be
around mag 13.0 unfiltered (DSLR) in a shot taken at 200mm. Faint and
quite reddened.

Here is just a selection of my previous 'rough' images of this object
(cropped from 55mm widefields and resized x2) with DSS plate overlays on
the position. While there is crowding and the shots lack high resolution,
with a limiting magnitude of around 12.5 the resolution is sufficient:
29 Sept 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727629Sept2010overlay.jpg
25 Oct 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727625Oct2010overlay.jpg
28 April 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727628Apr2011overlay.jpg<http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg>;
08 May 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-27172768May2011overlay.jpg
27 October 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727627Oct2011overlay.jpg
For reference, here's a 55mm shot from last night 13 May 2012, with little
or nothing registering at the position (outside the limiting magnitude of
~12.5):
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg
I'm assuming this would be very strange behaviour if it is a nova - varying
by less than a magnitude for over a year as far as I can see, and maybe
considerably longer.

Cheers -

Rob Kaufman (KBJ)
Bright, Victoria, Australia

The spectrum appears to have been interpreted as a nova in late decline,
On Mon, May 14, 2012 at 10:40 PM, arne <arne@...> wrote
:

> Another interesting possible nova event, deep in the heart of Sagittarius,
> but visible from the southern U.S. and the southern hemisphere. The
> discovery was 2012-04-23 according to the CBAT transient objects
> confirmation page; description of images of it dating from February 19,
> 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
>
> This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V
> and i' images from 2012-03-27 at
> http://www.aavso.org/tmp3/**pnvj1811v.jpg<http://www.aavso.org/tmp3/pnvj1811v.jpg>;
> http://www.aavso.org/tmp3/**pnvj1811i.jpg<http://www.aavso.org/tmp3/pnvj1811i.jpg>;
> (these are 12x12arcmin section
s of
the bigger APASS images, with north up
> and east left.)
>
> Taichi Kato posts on the vsnet group that there are spectra of it,
> indicating it is highly reddened and currently in the nebular stage (so
> late-time). I haven't seen where the spectra are posted. The basic
> reported light curve and the fact that Mati Morel indicates a red SPM and
> 2MASS star near this location would normally imply that this is just a mira
> variable, so the spectra are really important.
>
> It is still bright, and probably worthy of continued monitoring, but be
> very careful of the crowding. I'll have Elizabeth put out a special notice
> when she get into the office.
> Arne
>
**_________________
>
> Aavso-discussion mailing list
> Aavso-discussion@...
> To change options or unsubscribe, goto http://www.aavso.org/mailman/**
> listinfo/aavso-discussion<http://www.aavso.org/mailman/listinfo/aavso-discussion>;
>

Message: 5
Date: Mon, 14 May 2012 16:11:26 +0200
From: FIDRICH Robert <fidusz@...>
To: meineko <skiyotax@...>
Cc: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <20120514141126.GA3804@...>
Content-Type: text/plain; charset=utf-8

> >Taichi Kato posts on the vsnet group that there are spectra of it,
> >indicating it is highly reddened and currently in the nebular
> >stage (so late-time). I haven't seen where the spectra are posted.
> >The basic reported light curve and the fact that Mati Morel
> >indicates a red SPM and 2MASS star n
ear
this location would
> >normally imply that this is just a mira variable, so the spectra
> >are really important.
> Yes. It should be mira variable in my first impression, too.
> But it seems to be indeed classical nova.
> Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
> http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif

As I can recall Dr. Kato mentioned the possibility a symbiotic nova.
Isn't that an option? 

Or a slow nova like HR Del.

Anyway I wonder what archive photos will tell about the start of the
outburst.

Clear skies,

-- 
Fidusz (FIDRICH Robert)
drotlevel:fidusz@...
#jabber/gtalk: fidusz@...
#skype: fidusz

Aavso-discussion mailing list
Aavso-discussion@...
g
To change options or unsubscribe goto http://www.aavso.org/mailman/listinfo/aavso-discussion 

End of Aavso-discussion Digest, Vol 104, Issue 16
*************************************************

A suggestion, check carrefully the pixel size given to ISIS (6.45 microns
for an Atik 314L+)
(Internal calibration)? It's OK ?

Christian B

----- Original Message -----
From: "Joseph" <jrhobart@...>
To: <spectro-l@yahoogroups.com>
Sent: Tuesday, May 08, 2012 8:27 PM
Subject: [spectro-l] Re: LISA Calibration Problem

>
> Now that I better understand how to use ISIS V4.2.0, I carefully repeated
> the steps listed in:
>
>   LISA Pack: User Guide and Reference Manual
>
> I get still get results similar to those I first reported.  Using only the
> LISA internal Neon calibration lamp, I get:
>
>   RMS = 68 angstroms
>   Resolution = 470
>
> These values are very much different than the values shown in the User
> Guide and Reference Manual.  I worried that something was wrong with the
> LISA.
>
> Measuring the solar spectrum H-alpha and H-beta gives:
>
>   6555 and 4830 angstroms  (Better than my first measurements)
>
> As suggested by Christian Buil, I then used part 2 of the User Guide and
> Reference Manual.  Now I get:
>
>   RMS = 0.05 angstrom  (This is more than 1300 times better)
>   Resolution = 740
>
>   Solar Spectrum H-alpha  estimate  6563.4
>                  H-beta   estimate  4861.6
>
> which are close to the accepted values.
>
> My problem was the huge difference in step 1 between my results of RMS =
> 68 and the RMS = 1.1 on page 44 of the User Guide and Reference Manual.
>
> I carefully focused the camera, but I still get only Resolution of 740.
> Could this be due to my 9 micron pixels (SBIG ST-402 camera)?
>
> The RMS value of 1.1 angstrom and Resolution of 1015 listed in User Guide
> and Reference Manual were very misleading for me.
>
>
> A question for Christian Buil:  Is it possible to add more lines during
> the LISA Internal Neon calibration to improve the accuracy of the
> calibration using only the Neon light?
>
> Thanks to everyone who answered my questions,
> Joe Hobart
> Flagstaff, Arizona
>
>
> --- In spectro-l@yahoogroups.com, "Joseph" <jrhobart@...> wrote:
>>
>>
>> I have been working through the LISA Pack: User Guide and Reference
>> Manual.  I am not able to calibrate a solar image using the LISA internal
>> Neon lamp.
>>
>> My values for the Coefficient and RMS are very different from those shown
>> in the manual: Coefficients a3 and a4 are different by a factor of 1000,
>> RMS: 67 (manual shows 1.1), and Resolution: 421 (manual shows 1015).
>>
>> The H-alpha line is about 20 angstroms off, and the H-beta line is about
>> 120 angstroms off, so the dispersion is not correct.  I believe I have
>> selected the correct Neon 5944.83 line.
>>
>> I am using a SBIG ST-402 camera with 9 micron pixels, and I entered that
>> value in ISIS v4.2.0.
>>
>> Does anyone have any ideas what I might be doing wrong?
>>
>> Thanks,
>> Joe Hobart
>> Flagstaff, Arizona
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

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Today's Topics:

 1. SS Cyg request for observations (Matthew Templeton)
 2. PNV J18110375-2717276 (arne)
 3. Re: PNV J18110375-2717276 (meineko)

4. Re: PNV J18110375-2717276 (Rob Kaufman)
 5. Re: PNV J18110375-2717276 (FIDRICH Rob
ert)

Message: 1
Date: Mon, 14 May 2012 06:43:07 -0400 (EDT)
From: Matthew Templeton <matthewt@...>
To: aavso-discussion@...

Subject: [AAVSO-DIS] SS Cyg request for observations
Message-ID: <alpine.LFD.2.00.1205140641190.29871@...>
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII

Hello everyone,

We have indication that SS Cyg may have started an outburst within the 
past 12 hours. If you have observations of SS Cyg, please submit them as 
early in the day as possible. If you are still in darkness and can see SS 

Cyg, new observations would be greatly appreciated.

Clear skies,

 Matthew

Matthew Templeton, Ph.D.
Science Director
American Association of Variable Star Observers

Message: 2

Date: Mon, 14 May 2012 08:40:26 -0400
From: arne <arne@...&g
t;
To: AAVSO Discussion group <aavso-discussion@...>
Subject: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB0FD3A.5000102@...>

Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Another interesting possible nova event, deep in the heart of Sagittarius, but 
visible from the southern U.S. and the southern hemisphere. The discovery was 

2012-04-23 according to the CBAT transient objects confirmation page; 
description of images of it dating from February 19, 2011 are posted. It 
appeared to peak around mag 10 and is around 13th now.

This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V and 

i' images from 2012-03-27 at
http://www.aavso.org/tmp3/pnvj1811v.jpg
http://www.aavso.org/tmp3/pnvj1811i.jpg

(these are 12x12arcmin sections of the bi
gger
APASS images, with north up and 
east left.)

Taichi Kato posts on the vsnet group that there are spectra of it, indicating it 
is highly reddened and currently in the nebular stage (so late-time). I haven't 

seen where the spectra are posted. The basic reported light curve and the fact 
that Mati Morel indicates a red SPM and 2MASS star near this location would 
normally imply that this is just a mira variable, so the spectra are really 

important.

It is still bright, and probably worthy of continued monitoring, but be very 
careful of the crowding. I'll have Elizabeth put out a special notice when she 
get into the office.
Arne

Message: 3
Date: Mon, 14 May 2012 22:30:30 +0900
From: meineko <skiyotax@...>
To: aavso-discussion@...

Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB108F6.2000807@...>
Content-Type: text/plain; charset=UTF-8; format=flowed

(2012/05/14 21:40), arne wrote:
> Taichi Kato posts on the vsnet group that there are spectra of it, 
> indicating it is highly reddened and currently in the nebular stage 
> (so late-time). I haven't seen where the spectra are posted. The basic 

> reported light curve and the fact that Mati Morel indicates a red SPM 
> and 2MASS star near this location would normally imply that this is 
> just a mira variable, so the spectra are really important. 

Yes. It should be mira variable in my first impression, too.
But it seems to be indeed classical nova.

Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif

#We have to discuss why it's progenitor is bright only in infrared.

Please check your images since 2009 or earlier.
I'm sorry but I can not write detailed information about it as it is available only in personal communication and have not announced officially yet.

Seiichiro Kiyota
 Tsukuba, Japan

Message: 4
Date: Tue, 15 May 2012 00:01:00 +1000
From: Rob Kaufman <rob.kau@...>

To: arne <arne@...>, AAVSO Discussion group
	<aavso-discussion@...>,	vsnet-alert

<vsnet-alert@...>
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID:
	<CAEiDP-W-dck8b1_8ymkpA+mF3B3Nn0fUDu=vGaTpeabtGPjahw@...>

Content-Type: text/plain; charset=ISO-8859-1

I have it in images going back to Sept 2010 but can't track it further back
because I was shooting at smaller image size and le
ss
resolution before
that. Quite bright in Oct 2010. As Seiichiro Kiyota says, it needs to be
tracked back further. Last night (13.567 May 2012 UT) I made it out to be
around mag 13.0 unfiltered (DSLR) in a shot taken at 200mm. Faint and

quite reddened.

Here is just a selection of my previous 'rough' images of this object
(cropped from 55mm widefields and resized x2) with DSS plate overlays on
the position. While there is crowding and the shots lack high resolution,

with a limiting magnitude of around 12.5 the resolution is sufficient:
29 Sept 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727629Sept2010overlay.jpg

25 Oct 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727625Oct2010overlay.jpg

28 April 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727628Apr2011overlay.jpg<http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg&gt;

08 May 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-27172768May2011overlay.jpg

27 October 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727627Oct2011overlay.jpg

For reference, here's a 55mm shot from last night 13 May 2012, with little
or nothing registering at the position (outside the limiting magnitude of
~12.5):
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg

I'm assuming this would be very strange behaviour if it is a nova - varying
by less than a magnitude for over a year as far as I can see, and maybe
considerably longer.

Cheers -

Rob Kaufman (KBJ)

Bright, Victoria, Australia

The spectrum appears to have been interpreted as a nova in late decline,
On Mon, May 14, 2012 at 10:40 PM, arne <arne@...> wrote
:

> Another interesting possible nova event, deep in the heart of Sagittarius,
> but visible from the southern U.S. and the southern hemisphere. The
> discovery was 2012-04-23 according to the CBAT transient objects

> confirmation page; description of images of it dating from February 19,
> 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
>
> This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V

> and i' images from 2012-03-27 at
> http://www.aavso.org/tmp3/**pnvj1811v.jpg<http://www.aavso.org/tmp3/pnvj1811v.jpg&gt;

> http://www.aavso.org/tmp3/**pnvj1811i.jpg<http://www.aavso.org/tmp3/pnvj1811i.jpg&gt;

> (these are 12x12arcmin section
s of
the bigger APASS images, with north up
> and east left.)
>
> Taichi Kato posts on the vsnet group that there are spectra of it,
> indicating it is highly reddened and currently in the nebular stage (so

> late-time). I haven't seen where the spectra are posted. The basic
> reported light curve and the fact that Mati Morel indicates a red SPM and
> 2MASS star near this location would normally imply that this is just a mira

> variable, so the spectra are really important.
>
> It is still bright, and probably worthy of continued monitoring, but be
> very careful of the crowding. I'll have Elizabeth put out a special notice

> when she get into the office.
> Arne
>
**_________________
>
> Aavso-discussion mailing list
> Aavso-discussion@...

> To change options or unsubscribe, goto http://www.aavso.org/mailman/**
> listinfo/aavso-discussion<http://www.aavso.org/mailman/listinfo/aavso-discussion&gt;

>

Message: 5
Date: Mon, 14 May 2012 16:11:26 +0200
From: FIDRICH Robert <fidusz@...>
To: meineko <skiyotax@...>

Cc: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <20120514141126.GA3804@...>

Content-Type: text/plain; charset=utf-8

> >Taichi Kato posts on the vsnet group that there are spectra of it,
> >indicating it is highly reddened and currently in the nebular
> >stage (so late-time). I haven't seen where the spectra are posted.

> >The basic reported light curve and the fact that Mati Morel
> >indicates a red SPM and 2MASS star n
ear
this location would
> >normally imply that this is just a mira variable, so the spectra
> >are really important.
> Yes. It should be mira variable in my first impression, too.
> But it seems to be indeed classical nova.

> Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
> http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif

As I can recall Dr. Kato mentioned the possibility a symbiotic nova.
Isn't that an option? 

Or a slow nova like HR Del.

Anyway I wonder what archive photos will tell about the start of the
outburst.

Clear skies,

-- 
Fidusz (FIDRICH Robert)
drotlevel:fidusz@...
#jabber/gtalk: fidusz@...

#skype: fidusz

Aavso-discussion mailing list
Aavso-discussion@...
g
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Today's Topics:
1. SS Cyg request for observations (Matthew Templeton)
2. PNV J18110375-2717276 (arne)
3. Re: PNV J18110375-2717276 (meineko)
4. Re: PNV J18110375-2717276 (Rob Kaufman)
5. Re: PNV J18110375-2717276 (FIDRICH Rob
ert)

Message: 1
Date: Mon, 14 May 2012 06:43:07 -0400 (EDT)
From: Matthew Templeton <matthewt@...>
To: aavso-discussion@...
Subject: [AAVSO-DIS] SS Cyg request for observations
Message-ID: <alpine.LFD.2.00.1205140641190.29871@...>
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
Hello everyone,
We have indication that SS Cyg may have started an outburst within the past 12 hours. If you have observations of SS Cyg, please submit them as early in the day as possible. If you are still in darkness and can see SS Cyg, new observations would be greatly appreciated.
Clear skies,
Matthew
Matthew Templeton, Ph.D.
Science Director
American Association of Variable Star Observers

Message: 2
Date: Mon, 14 May 2012 08:40:26 -0400
From: arne <arne@...&g
t;
To: AAVSO Discussion group <aavso-discussion@...>
Subject: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB0FD3A.5000102@...>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Another interesting possible nova event, deep in the heart of Sagittarius, but visible from the southern U.S. and the southern hemisphere. The discovery was 2012-04-23 according to the CBAT transient objects confirmation page; description of images of it dating from February 19, 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V and i' images from 2012-03-27 at
http://www.aavso.org/tmp3/pnvj1811v.jpg
http://www.aavso.org/tmp3/pnvj1811i.jpg
(these are 12x12arcmin sections of the bi
gger
APASS images, with north up and east left.)
Taichi Kato posts on the vsnet group that there are spectra of it, indicating it is highly reddened and currently in the nebular stage (so late-time). I haven't seen where the spectra are posted. The basic reported light curve and the fact that Mati Morel indicates a red SPM and 2MASS star near this location would normally imply that this is just a mira variable, so the spectra are really important.
It is still bright, and probably worthy of continued monitoring, but be very careful of the crowding. I'll have Elizabeth put out a special notice when she get into the office.
Arne

Message: 3
Date: Mon, 14 May 2012 22:30:30 +0900
From: meineko <skiyotax@...>
To: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB108F6.2000807@...>
Content-Type: text/plain; charset=UTF-8; format=flowed
(2012/05/14 21:40), arne wrote:
> Taichi Kato posts on the vsnet group that there are spectra of it, > indicating it is highly reddened and currently in the nebular stage > (so late-time). I haven't seen where the spectra are posted. The basic > reported light curve and the fact that Mati Morel indicates a red SPM > and 2MASS star near this location would normally imply that this is > just a mira variable, so the spectra are really important. Yes. It should be mira variable in my first impression, too.
But it seems to be indeed classical nova.
Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif
#We have to discuss why it's progenitor is bright only in infrared.
Please check your images since 2009 or earlier.
I'm sorry but I can not write detailed information about it as it is available only in personal communication and have not announced officially yet.
Seiichiro Kiyota
Tsukuba, Japan

Message: 4
Date: Tue, 15 May 2012 00:01:00 +1000
From: Rob Kaufman <rob.kau@...>
To: arne <arne@...>, AAVSO Discussion group
<aavso-discussion@...>,	vsnet-alert
<vsnet-alert@...>
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID:
<CAEiDP-W-dck8b1_8ymkpA+mF3B3Nn0fUDu=vGaTpeabtGPjahw@...>
Content-Type: text/plain; charset=ISO-8859-1
I have it in images going back to Sept 2010 but can't track it further back
because I was shooting at smaller image size and le
ss
resolution before
that. Quite bright in Oct 2010. As Seiichiro Kiyota says, it needs to be
tracked back further. Last night (13.567 May 2012 UT) I made it out to be
around mag 13.0 unfiltered (DSLR) in a shot taken at 200mm. Faint and
quite reddened.
Here is just a selection of my previous 'rough' images of this object
(cropped from 55mm widefields and resized x2) with DSS plate overlays on
the position. While there is crowding and the shots lack high resolution,
with a limiting magnitude of around 12.5 the resolution is sufficient:
29 Sept 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727629Sept2010overlay.jpg
25 Oct 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727625Oct2010overlay.jpg
28 April 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727628Apr2011overlay.jpg<http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg&gt;
08 May 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-27172768May2011overlay.jpg
27 October 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727627Oct2011overlay.jpg
For reference, here's a 55mm shot from last night 13 May 2012, with little
or nothing registering at the position (outside the limiting magnitude of
~12.5):
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg
I'm assuming this would be very strange behaviour if it is a nova - varying
by less than a magnitude for over a year as far as I can see, and maybe
considerably longer.
Cheers -
Rob Kaufman (KBJ)
Bright, Victoria, Australia
The spectrum appears to have been interpreted as a nova in late decline,
On Mon, May 14, 2012 at 10:40 PM, arne <arne@...> wrote
:
> Another interesting possible nova event, deep in the heart of Sagittarius,
> but visible from the southern U.S. and the southern hemisphere. The
> discovery was 2012-04-23 according to the CBAT transient objects
> confirmation page; description of images of it dating from February 19,
> 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
>
> This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V
> and i' images from 2012-03-27 at
> http://www.aavso.org/tmp3/**pnvj1811v.jpg<http://www.aavso.org/tmp3/pnvj1811v.jpg&gt;
> http://www.aavso.org/tmp3/**pnvj1811i.jpg<http://www.aavso.org/tmp3/pnvj1811i.jpg&gt;
> (these are 12x12arcmin section
s of
the bigger APASS images, with north up
> and east left.)
>
> Taichi Kato posts on the vsnet group that there are spectra of it,
> indicating it is highly reddened and currently in the nebular stage (so
> late-time). I haven't seen where the spectra are posted. The basic
> reported light curve and the fact that Mati Morel indicates a red SPM and
> 2MASS star near this location would normally imply that this is just a mira
> variable, so the spectra are really important.
>
> It is still bright, and probably worthy of continued monitoring, but be
> very careful of the crowding. I'll have Elizabeth put out a special notice
> when she get into the office.
> Arne
>**_________________
>
> Aavso-discussion mailing list
> Aavso-discussion@...
> To change options or unsubscribe, goto http://www.aavso.org/mailman/**
> listinfo/aavso-discussion<http://www.aavso.org/mailman/listinfo/aavso-discussion&gt;
>

Message: 5
Date: Mon, 14 May 2012 16:11:26 +0200
From: FIDRICH Robert <fidusz@...>
To: meineko <skiyotax@...>
Cc: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <20120514141126.GA3804@...>
Content-Type: text/plain; charset=utf-8
> >Taichi Kato posts on the vsnet group that there are spectra of it,
> >indicating it is highly reddened and currently in the nebular
> >stage (so late-time). I haven't seen where the spectra are posted.
> >The basic reported light curve and the fact that Mati Morel
> >indicates a red SPM and 2MASS star n
ear
this location would
> >normally imply that this is just a mira variable, so the spectra
> >are really important.
> Yes. It should be mira variable in my first impression, too.
> But it seems to be indeed classical nova.
> Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
> http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif
As I can recall Dr. Kato mentioned the possibility a symbiotic nova.
Isn't that an option? Or a slow nova like HR Del.
Anyway I wonder what archive photos will tell about the start of the
outburst.
Clear skies,
-- Fidusz (FIDRICH Robert)
drotlevel:fidusz@...
#jabber/gtalk: fidusz@...
#skype: fidusz

Aavso-discussion mailing list
Aavso-discussion@...
g
To change options or unsubscribe goto http://www.aavso.org/mailman/listinfo/aavso-discussion End of Aavso-discussion Digest, Vol 104, Issue 16
*************************************************

-- Fran�ois Teyssier
www.astronomie-amateur.fr

-- Olivier Thizy
Shelyak Instruments
Manufacturing: 73, rue de Chartreuse, 38420 Le Versoud, France
Headquarter: Les Roussets, 38420 Revel, France
Phone: +33.(0)4.76.41.36.81
Mobile: +33.(0)6.89.92.74.23
Web: http://www.shelyak.com
...vous ne verrez plus les étoiles comme avant !
AAVSO Special Notice #281

Revised timetable for AE Aqr MAGIC observations
May 15, 2012

Dr. Christopher Mauche, Lawrence Livermore National Laboratory, 
has informed us that the timetable of MAGIC observations of the
intermediate polar cataclysmic variable AE Aqr announced in 
AAVSO Alert Notice 458 has been revised. Here is the revised 
timetable for the dates in May and early June:

2012 May
16, 3:30 - 4:49 UT
17, 3:21 - 4:49
18, 3:17 - 4:49
19, 3:13 - 4:47
20, 3:09 - 3:53
21, 3:06 - 3:49
22, 3:02 - 3:45
23, 2:58 - 3:41
24, 2:54 - 3:37
25, 2:50 - 3:33
26, 2:46 - 3:29
27, 2:42 - 3:25
28, 2:38 - 3:21
29, 2:34 - 3:17
30, 2:25 - 3:13
31, 2:15 - 3:09
2012 June 
01, 3:28 - 4:54 UT
02, 3:45 - 4:54

The later dates in June in Alert Notice 458 have not been revised
as of this time.

As mentioned in Alert Notice 458, B-band photometry is requested 
during and +/- 1 hour around the times of the MAGIC observations 
in order to correlate the multiwavelength observations of this 
campaign, and nightly observations thereafter until the end of 
June. Visual observations and photometry in other bands are also 
welcome. The 122 and 124 on the AAVSO chart for AE Aqr should be 
used. Please see Alert Notice 458 for additional details.

Particularly in May, AAVSO observations are crucial because all 
but one of the ground-based observatories doing optical 
photometry are too far west to observe AE Aqr at this time. 

The MAGIC telescope is located at latitude and longitude:
N 28o 45.7245 / W 017o 53.4007

If your observatory is located along or near this latitude, 
your observations are even more crucial, and your special 
attention would be gratefully appreciated.

Coordinates for AE Aqr: R.A. 20 40 09.16 Dec. -00 52 15.1 (J2000.0)

Charts may be created using the AAVSO Variable Star Plotter
http://www.aavso.org/vsp

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

---------------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO

Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs

SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive/

Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices

Send Aavso-discussion mailing list submissions to
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When replying, please edit your Subject line so it is more specific
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Today's Topics:
1. SS Cyg request for observations (Matthew Templeton)
2. PNV J18110375-2717276 (arne)
3. Re: PNV J18110375-2717276 (meineko)
4. Re: PNV J18110375-2717276 (Rob Kaufman)
5. Re: PNV J18110375-2717276 (FIDRICH Rob
ert)

Message: 1
Date: Mon, 14 May 2012 06:43:07 -0400 (EDT)
From: Matthew Templeton <matthewt@...>
To: aavso-discussion@...
Subject: [AAVSO-DIS] SS Cyg request for observations
Message-ID: <alpine.LFD.2.00.1205140641190.29871@...>
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
Hello everyone,
We have indication that SS Cyg may have started an outburst within the past 12 hours. If you have observations of SS Cyg, please submit them as early in the day as possible. If you are still in darkness and can see SS Cyg, new observations would be greatly appreciated.
Clear skies,
Matthew
Matthew Templeton, Ph.D.
Science Director
American Association of Variable Star Observers

Message: 2
Date: Mon, 14 May 2012 08:40:26 -0400
From: arne <arne@...&g
t;
To: AAVSO Discussion group <aavso-discussion@...>
Subject: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB0FD3A.5000102@...>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Another interesting possible nova event, deep in the heart of Sagittarius, but visible from the southern U.S. and the southern hemisphere. The discovery was 2012-04-23 according to the CBAT transient objects confirmation page; description of images of it dating from February 19, 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V and i' images from 2012-03-27 at
http://www.aavso.org/tmp3/pnvj1811v.jpg
http://www.aavso.org/tmp3/pnvj1811i.jpg
(these are 12x12arcmin sections of the bi
gger
APASS images, with north up and east left.)
Taichi Kato posts on the vsnet group that there are spectra of it, indicating it is highly reddened and currently in the nebular stage (so late-time). I haven't seen where the spectra are posted. The basic reported light curve and the fact that Mati Morel indicates a red SPM and 2MASS star near this location would normally imply that this is just a mira variable, so the spectra are really important.
It is still bright, and probably worthy of continued monitoring, but be very careful of the crowding. I'll have Elizabeth put out a special notice when she get into the office.
Arne

Message: 3
Date: Mon, 14 May 2012 22:30:30 +0900
From: meineko <skiyotax@...>
To: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <4FB108F6.2000807@...>
Content-Type: text/plain; charset=UTF-8; format=flowed
(2012/05/14 21:40), arne wrote:
> Taichi Kato posts on the vsnet group that there are spectra of it, > indicating it is highly reddened and currently in the nebular stage > (so late-time). I haven't seen where the spectra are posted. The basic > reported light curve and the fact that Mati Morel indicates a red SPM > and 2MASS star near this location would normally imply that this is > just a mira variable, so the spectra are really important. Yes. It should be mira variable in my first impression, too.
But it seems to be indeed classical nova.
Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif
#We have to discuss why it's progenitor is bright only in infrared.
Please check your images since 2009 or earlier.
I'm sorry but I can not write detailed information about it as it is available only in personal communication and have not announced officially yet.
Seiichiro Kiyota
Tsukuba, Japan

Message: 4
Date: Tue, 15 May 2012 00:01:00 +1000
From: Rob Kaufman <rob.kau@...>
To: arne <arne@...>, AAVSO Discussion group
<aavso-discussion@...>,	vsnet-alert
<vsnet-alert@...>
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID:
<CAEiDP-W-dck8b1_8ymkpA+mF3B3Nn0fUDu=vGaTpeabtGPjahw@...>
Content-Type: text/plain; charset=ISO-8859-1
I have it in images going back to Sept 2010 but can't track it further back
because I was shooting at smaller image size and le
ss
resolution before
that. Quite bright in Oct 2010. As Seiichiro Kiyota says, it needs to be
tracked back further. Last night (13.567 May 2012 UT) I made it out to be
around mag 13.0 unfiltered (DSLR) in a shot taken at 200mm. Faint and
quite reddened.
Here is just a selection of my previous 'rough' images of this object
(cropped from 55mm widefields and resized x2) with DSS plate overlays on
the position. While there is crowding and the shots lack high resolution,
with a limiting magnitude of around 12.5 the resolution is sufficient:
29 Sept 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727629Sept2010overlay.jpg
25 Oct 2010
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727625Oct2010overlay.jpg
28 April 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727628Apr2011overlay.jpg<http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg&gt;
08 May 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-27172768May2011overlay.jpg
27 October 2011
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727627Oct2011overlay.jpg
For reference, here's a 55mm shot from last night 13 May 2012, with little
or nothing registering at the position (outside the limiting magnitude of
~12.5):
http://i727.photobucket.com/albums/ww271/Rob_Kau/PNVJ18110375-271727613May2012overlay.jpg
I'm assuming this would be very strange behaviour if it is a nova - varying
by less than a magnitude for over a year as far as I can see, and maybe
considerably longer.
Cheers -
Rob Kaufman (KBJ)
Bright, Victoria, Australia
The spectrum appears to have been interpreted as a nova in late decline,
On Mon, May 14, 2012 at 10:40 PM, arne <arne@...> wrote
:
> Another interesting possible nova event, deep in the heart of Sagittarius,
> but visible from the southern U.S. and the southern hemisphere. The
> discovery was 2012-04-23 according to the CBAT transient objects
> confirmation page; description of images of it dating from February 19,
> 2011 are posted. It appeared to peak around mag 10 and is around 13th now.
>
> This was observed on 2012-03-26 and 2012-03-27 by APASS. I've placed the V
> and i' images from 2012-03-27 at
> http://www.aavso.org/tmp3/**pnvj1811v.jpg<http://www.aavso.org/tmp3/pnvj1811v.jpg&gt;
> http://www.aavso.org/tmp3/**pnvj1811i.jpg<http://www.aavso.org/tmp3/pnvj1811i.jpg&gt;
> (these are 12x12arcmin section
s of
the bigger APASS images, with north up
> and east left.)
>
> Taichi Kato posts on the vsnet group that there are spectra of it,
> indicating it is highly reddened and currently in the nebular stage (so
> late-time). I haven't seen where the spectra are posted. The basic
> reported light curve and the fact that Mati Morel indicates a red SPM and
> 2MASS star near this location would normally imply that this is just a mira
> variable, so the spectra are really important.
>
> It is still bright, and probably worthy of continued monitoring, but be
> very careful of the crowding. I'll have Elizabeth put out a special notice
> when she get into the office.
> Arne
>**_________________
>
> Aavso-discussion mailing list
> Aavso-discussion@...
> To change options or unsubscribe, goto http://www.aavso.org/mailman/**
> listinfo/aavso-discussion<http://www.aavso.org/mailman/listinfo/aavso-discussion&gt;
>

Message: 5
Date: Mon, 14 May 2012 16:11:26 +0200
From: FIDRICH Robert <fidusz@...>
To: meineko <skiyotax@...>
Cc: aavso-discussion@...
Subject: Re: [AAVSO-DIS] PNV J18110375-2717276
Message-ID: <20120514141126.GA3804@...>
Content-Type: text/plain; charset=utf-8
> >Taichi Kato posts on the vsnet group that there are spectra of it,
> >indicating it is highly reddened and currently in the nebular
> >stage (so late-time). I haven't seen where the spectra are posted.
> >The basic reported light curve and the fact that Mati Morel
> >indicates a red SPM and 2MASS star n
ear
this location would
> >normally imply that this is just a mira variable, so the spectra
> >are really important.
> Yes. It should be mira variable in my first impression, too.
> But it seems to be indeed classical nova.
> Spectrum taken by Fujii-san (Japanese amateur expert of spectroscopy) is available a?
> http://otobs.org/FBO/novae/pnv_j18110375_20120512.gif
As I can recall Dr. Kato mentioned the possibility a symbiotic nova.
Isn't that an option? Or a slow nova like HR Del.
Anyway I wonder what archive photos will tell about the start of the
outburst.
Clear skies,
-- Fidusz (FIDRICH Robert)
drotlevel:fidusz@...
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-- Fran�ois Teyssier
www.astronomie-amateur.fr

-- Fran�ois Teyssier
www.astronomie-amateur.fr

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