This is our system:

http://sites.google.com/site/starphotometr/home/instruments-and-imaging-system


Best Regards,

Marco Silva & Stefano Padovan
http://sites.google.com/site/starphotometr/


[Non-text portions of this message have been removed]

http://arxiv.org/abs/0911.5254

Nova Eridani
Here's a new spectrum (2009 nov 29,92)

http://www.astronomie-amateur.fr/Projets%20Spectro4B%20Novae.html

Kind Regards

François Teyssier
(France)

>
>



[Non-text portions of this message have been removed]

--- In cvnet-discussion@yahoogroups.com, "Eddy Muyllaert" <eddy.muyllaert1@...>
wrote:
>
> http://www.universetoday.com/2009/11/27/observing-news-nova-eridani-flash-fi
> re/
>

Eddy, did you notice that this announcement used a reversed chart for the nova?
That should provide some fun for folks trying to ID the field...at least until
they catch on about the situation.

J.Bortle (BRJ)

http://www.universetoday.com/2009/11/27/observing-news-nova-eridani-flash-fi
re/

It has been my pleasure to work on an interview with Albert Jones, highlighting
his life story, variable star observations, comet discoveries and the story of
the man. I think what Albert has to say is interesting, enlightening and
inspiring.

This piece was a labor of love. I am so happy to share it with you. I hope you
enjoy it as much as I enjoyed being part of it.
http://simostronomy.blogspot.com/2009/11/albert-jones-interbiew.html

--
Mike Simonsen
Vice President
American Association of Variable Star Observers
49 Bay State Rd.
Cambridge, MA 02138
617-354-0484
www.aavso.org

http://sites.google.com/site/starphotometr/cataclismic-variable-stars/tt-arietis\
/tt-ari-25-nov-2009

Last night. Standstill phase??

--
Clear Skies!

Marco Silva


[Non-text portions of this message have been removed]

Hi Marco,

AT Cnc is a Z Cam star in the Z CamPaign.
https://sites.google.com/site/aavsocvsection/z-campaign

It is one of the unusual cases that appears to go into outburst from
standstill, so it is of particular interest to the us, and we'd like
fairly continuous hourly observations when it is in standstill.

Otherwise, it is a rather ordinary (if unpredictable) Z Cam that is
well covered by visual observers.

--
Mike Simonsen
Vice President
American Association of Variable Star Observers
49 Bay State Rd.
Cambridge, MA 02138
617-354-0484
www.aavso.org



On Wed, Nov 25, 2009 at 5:19 AM, Marco Silva <mabuni1982@...> wrote:
> Hi All,
>
> Me and Stefano are interested for observing AT CNC. Is there any one that
> are following this object?
>
> We would like to understand if it's a good target or not.
>
> --
> Clear Skies!
>
> Marco Silva & Stefano Padovan
> _______________________________________________
>
> Aavso-photometry mailing list
> Aavso-photometry@...
> To change options or unsubscribe, goto
http://www.aavso.org/mailman/listinfo/aavso-photometry
>
> The Santa Barbara Instrument Group (www.sbig.com): Take the next step. SGS,
> the self-guiding spectrograph.
>

Hi Marco,



AT Cnc is a typical Z Cam-type dwarf nova with outbursts and standstills.
Good target? Maybe in following the phase of the standstills.

Look at http://www.konkoly.hu/cgi-bin/IBVS?5099



Regards,

Eddy Muyllaert





   _____

Van: cvnet-discussion@yahoogroups.com
[mailto:cvnet-discussion@yahoogroups.com] Namens Marco Silva
Verzonden: woensdag 25 november 2009 11:19
Aan: cba-chat@...; Aavso-discussion@...;
aavso-photometry@...; cvnet-discussion@yahoogroups.com
Onderwerp: [cvnet-discussion] Information about AT CNC





Hi All,

Me and Stefano are interested for observing AT CNC. Is there any one that
are following this object?

We would like to understand if it's a good target or not.

--
Clear Skies!

Marco Silva & Stefano Padovan

[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

Hi All,

Me and Stefano are interested for observing AT CNC. Is there any one that
are following this object?

We would like to understand if it's a good target or not.

--
Clear Skies!

Marco Silva & Stefano Padovan


[Non-text portions of this message have been removed]

Hi All,

Here another session on TT Ari:

http://sites.google.com/site/starphotometr/cataclismic-variable-stars/tt-arietis\
/tt-ari-24-nov-2009

Telescope: G5 at NM (www.global-rent-a-scope.com) property of Stefano
Padovan.

PS: web site is still under costruction...


Clear Skies!

Stefano Padovan &Marco Silva


[Non-text portions of this message have been removed]

In case you missed any of these, here are Cvs with new GCVS names from the 79th
Name List of Variable Stars.
http://www.konkoly.hu/cgi-bin/IBVS?5863


Former suspected variables from the NSV catalog

NSV Name R.A., Decl., 2000.0 Type

01485 NN Cam 04 12 38.2 +69 29 09 UG
06052 V1147 Cen 13 00 57.6 -49 12 12 UGSS:
00601 FZ Cet 01 42 25.2 -22 15 57 UGSU
19553 MT Com 12 55 10.6 +26 42 27 NL+ZZ
13983 CS Ind 21 59 54.6 -68 50 37 UG

New novae and unusual stars

Name h m s o ' " Type Max Min Epoch References JD 24...

V0455 And 23 34 01.4 +39 21 41 UG 8.7 16.6 V 01 02
V0466 And 02 00 25.4 +44 10 19 UGSU 12.8 <19. V 03
V1721 Aql 19 06 28.6 +07 06 44 N 14.0 <20. * 54732: (2008) 04 2MASS
V1065 Cen 11 43 10.2 -58 04 04 NA 8.5 <17.0 V 54126 (2007) 05
V1212 Cen 14 35 02.5 -64 06 20 NA 8.38 <19. V 54708 (2008) 06
V0733 Cep 22 53 33.3 +62 32 24 FU: 15.7 <20. R 07 2MASS
V2467 Cyg 20 28 12.5 +41 48 36 NA 7.3 <18. V 54176 (2007) 08 09
V2468 Cyg 19 58 33.4 +29 52 06 NA 7.6 <18. V 54535 (2008) 10
V2491 Cyg 19 43 02.0 +32 19 14 NA: 7.4 <16. V 54568 (2008) 11 12
QY Mus 13 16 36.5 -67 36 48 N: 8.7: <17. V 54749: (2008) 13
V0390 Nor 16 32 11.5 -45 09 13 NA 9.8 <20. V 54271 (2007) 14
V2615 Oph 17 42 44.0 -23 40 35 NA 8.6 <20. V 54182 (2007) 15 09
V2670 Oph 17 39 50.9 -23 50 01 NA 10.0 <19. V 54614 (2008) 16 17
V2671 Oph 17 33 29.6 -27 01 14 NA 11.1 <19. * 54618: (2008) 18 17
V0597 Pup 08 16 18.0 -34 15 25 NA 7.0 <19. V 54419 (2007) 19
V0598 Pup 07 05 42.5 -38 14 39 XN 4.1 16. V 54257: (2007) 20
V5558 Sgr 18 10 18.3 -18 46 52 NB 6.53 <20. V 54292 (2007) 21 22
V5579 Sgr 18 05 58.9 -27 13 56 NA 6.7 <19. V 54580 (2008) 23 24
V1280 Sco 16 57 41.2 -32 20 36 NA 3.8 <20. V 54148 (2007) 25 26
V1281 Sco 16 56 59.4 -35 21 50 NA 9.0: <20. V 54154: (2007) 27 26
V1309 Sco 17 57 32.9 -30 43 10 NA 7.9 <18. V 54716 (2008) 28
NR TrA 16 18 48.2 -60 27 49 NA 8.5 <19. V 54570 29
V0458 Vul 19 54 24.6 +20 52 52 NA 8.1 18. V 54322 (2007) 30 22
V0459 Vul 19 48 08.9 +21 15 27 NA 7.2 20.: V 54462 (2007) 31

Timur Kryachko (Russia) report from unfiltered images with exposition
  300 sec (lim mag 21) taken with a Takahashi FRC-300 30-cm f/7.8 telescope
(+ Apogee Alta U9000 CCD camera) at KSU Astrotel Observatory
  (Karachay-Cherkessia, Russia).

JR mag

2455154.435347 16.54 CR
2455154.439132 16.55 CR
2455154.443032 16.54 CR
2455154.446921 16.51 CR
2455154.450833 16.48 CR

P.S.
This object was published on page CBAT Unconfirmed Observations Page:
<http://www.cfa.harvard.edu/iau/unconf/cbat_unconf.html>

Timur Kryachko (Russia) report the new object (mag approximately 16) on the 13
unfiltered images with
exposition 300 sec (lim mag 21) taken Nov. 10, 11 and 12, 2009 with a Takahashi
FRC-300 30-cm f/7.8 telescope (+ Apogee Alta U9000 CCD camera) at KSU Astrotel
Observatory (Karachay-Cherkessia, Russia).
The object was found by blinking with DSS2 R-photographic plate. All archival
DSS and 2MASS photographic plates shows this object fainter than 19-20 mag,
except DSS1 R and B plates.
The new object is located at R.A. = 06h26m57s.68 +/- 0.5, Decl. = +24d29m06s.8
+/- 0.5 (equinox 2000.0).
On the DDS1 consecutive B and R images is clearly visible that object is very
blue.
The object shows rather fast variability this days. Discovery image:
<http://www.makhaon.com/_files/transient.jpg>

Magnitude variability table:

JD mag

2455146.381076 16.24 CR
2455146.384711 16.20 CR
2455146.388657 16.18 CR
2455146.392558 16.18 CR
2455146.396481 16.18 CR

2455147.461146 15.72 CR
2455147.465069 15.77 CR
2455147.468924 15.74 CR
2455147.472836 15.77 CR
2455147.476736 15.78 CR

2455148.455694 15.90 CR
2455148.459491 15.95 CR
2455148.463437 15.92 CR

New magnitude estimation of new transient: 06h26m57s.68, +24d29m06s.8.
The object remains bright 7 days.

JD mag

2455153.415972 16.25 ÑR
2455153.419769 16.27 CR
2455153.423692 16.28 CR
2455153.427604 16.30 CR
2455153.431505 16.31 CR

Tom Boles graciously granted an interview for the Simostronomy blog. I think it
turned out well. If you're interested here is the url.

http://simostronomy.blogspot.com/2009/11/tom-boles-supernova-supersleuth.html

Cheers,

Mike Simonsen

CVs get mainstream astronomy coverage today.

The Introduction to the Z CamPaign made top billing in the Portal to the
Universe Blog Section today.

http://www.portaltotheuniverse.org/

Mike Simonsen

I gave a talk on the Z CamPaign at the AAVSO Fall Meeting, November 7, in
Newton, MA. This will be published as a paper in a future edition of the JAAVSO.
The PowerPoint of the talk can be downloaded from this page.

https://sites.google.com/site/aavsocvsection/z-campaign/z-campaign-update-nov-12\
-2009

AH Her continues its prolonged standstill. It also appears to have had two
outbursts from standstill, without dropping down to quiescence in recent months.
The recent light curve has excellent density of observations and shows this
clearly. My heartfelt thanks to all who are contributing data on this star. As
you can see from the awesome light curve, we haven't missed any sudden drop to
minimum, which is exactly what we were trying to rule out.

AB Dra, my favorite imposter candidate, continues its roughly 14 day periodic
sawtooth variation between minimum and maximum. There is no evidence of a
standstill in 40 years of AAVSO data.

IW And is fast becoming a favorite target for CCD observers, and with great
results. Visual observers can only pick up the star at maximum, but all the
action is happening between 15 and 17th magnitude. The light curve of the last
50 days is amazing in the fact it appears to show a standstill around 15th
magnitude going into outburst. We may have another Z Cam to add to the `oddball'
class. Note also in the light curve the rapid rise to maximum and the slower
fade that appears to be a trend. Keep up the coverage. We've never had this kind
of data before!

To read the full text and see the graphics please visit:
https://sites.google.com/site/aavsocvsection/z-campaign/z-campaign-update-nov-12\
-2009

Mike Simonsen
AAVSO

Hello all!

mikesimonsen wrote:

> Note Henden's position is very close to the catalog position:
> RA: 4h 12m 36.67s (63.15278) DEC: 69d 29m 6.7s (69.485182)
>
> The 15.308V companion is ~3 arc seconds away at
> RA: 4h 12m 38.22s (63.159247) DEC: 69d 29m 8.7s (69.48574)

Make it ~8 arc seconds, actually!  Difference in RA is (38.22-36.67) *
15 * cos(69.5) = 8.1".

I recall well the companion was 8.5" away during my RTT observations 2
years ago, so was a bit surprised when I saw Mike's message.  My first
thought was whether the star has moved due to the proper motion, but
this is definitely not the case. :-)  According to USNO-B1.0, NN Cam's
PM is rather 3-4" per century (-34 and +12 mas/yr in RA and Dec) and
that of companion star is (-8, 6) mas/yr, so they are actually slowly
receding from each other (USNO-A2.0 was giving a 7.4" distance).

Thus the variable can be separated from the companion even at moderate
seeing of 2.5-3", but of course care should be taken when selecting the
photometry ring, the gap and background radii.

Denis in Moscow

I have created a single night sequence for NN Cam (NSV 1485) in VSP.
http://www.aavso.org/observing/charts/vsp/

Please be advised this is taken from only one night of data from USNO
and may have errors as large as 0.05. When additional nights of
photometry are added from APASS or Sonoita, this sequence will be
updated.

Note Henden's position is very close to the catalog position:
RA: 4h 12m 36.67s (63.15278)   DEC: 69d 29m 6.7s (69.485182)

and he measured the CV at 17.913V  +/-0.033 on that night.

The 15.308V companion is ~3 arc seconds away at
RA: 4h 12m 38.22s (63.159247)   DEC: 69d 29m 8.7s (69.48574)

--
Mike Simonsen
AAVSO