Thanks for the Data Bob, I'm assuming you mean 2010 not 2001. Jeff Hopkins Phoenix Observatory Counting Photons Phoenix, Arizona USA ...
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Jeff Hopkins
hposoft
May 3, 2010 4:28 pm
Right now and over the next week or so epsilon Aurigae should be at a minimum meaning the eclipsing body should be blocking the most light from the F star....
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Stan Gorodenski
stanlep@...
May 3, 2010 4:38 pm
Hi Jeff, I'll try. I am not sure if the weather will cooperate (you are well aware of the weather we have been having), I need to go to Phoenix leaving now for...
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Jeff Hopkins
hposoft
May 3, 2010 4:47 pm
Hi Stan, I understand, but hope you will be able to squeeze in an observation. There will be another period after the mid-eclipse brightening in late summer...
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Robin Leadbeater
niborl2000
May 3, 2010 4:48 pm
Hi Jeff, All Actually radial velocity shifts are potentially at maximum near eclipse centre as the Keplerian orbital velocity of material in the disc is...
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Robin Leadbeater
niborl2000
May 3, 2010 4:54 pm
Hi Stan if you can get one or two more Na D line spectra it could be really useful. Try to start as early in twilight as you can. Remember any solar spectrum...
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FrankJ12@...
May 3, 2010 5:13 pm
All - While you guys are working on spectroscopic observations, I will continue to monitor Eps Aur photoelectrically in V light. I have about three weeks...
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Jeff Hopkins
hposoft
May 3, 2010 5:44 pm
Great, Thanks Frank, Jefff Hopkins Phoenix Observatory Counting Photons Phoenix, Arizona USA www.hposoft.com/Astro/astro.html International Epsilon Aurigae...
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Jeff Hopkins
hposoft
May 3, 2010 5:57 pm
Hi Robin, Do you mean orbital velocities rather than radial velocities (coming or going relative to use)? Since the F star and eclipsing body are moving...
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Jose Ribeiro
zerib57
May 3, 2010 7:07 pm
Hi all, If the weather allows and I have telescope time, I'll do a try tomorrow in H-alpha. BTW, the last newsletter is a lesson of what an international ProAm...
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Robin Leadbeater
niborl2000
May 3, 2010 7:30 pm
Hi Jeff, Yes the radial velocity component of the F star orbit will be close to the radial velocity of the system (ie its motion through space) during...
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stanlep@...
May 3, 2010 7:41 pm
Yes, I did get the note from Brian. See you at SAS. Stan...
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Robin Leadbeater
niborl2000
May 5, 2010 10:25 am
Last Saturday Des Loughney and I gave an update on the campaign at a BAA variable star section meeting. It was very well received but also of interest given...
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Jose Ribeiro
zerib57
May 5, 2010 10:32 pm
Greetings all, A spectrum of eps Aur taken last night. I can only work in H_alpha because I'm observing with Lisbon between me and eps Aur. In time I'll send...
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Robin Leadbeater
niborl2000
May 5, 2010 11:06 pm
Thank you Jose, A very interesting result. I see the blue wing emission has now completely gone compared with Thierry's measurement on 28th April. Robin ... ...
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FrankJ12@...
May 6, 2010 4:19 am
All - I did some Eps Aur photometry on the evening of May 5/6, 2010 and I came up with an average +3.78 V magnitude. It is a touch fainter than last week. ...
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Robert Stencel
coloida@...
May 6, 2010 4:32 am
The principle of forward scattering is nicely illustrated in the attached graphic from J. Elliott, 1977. To: EpsilonAurigae@yahoogroups.com From:...
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Robert Stencel
coloida@...
May 6, 2010 4:32 am
Of course, 2010 - darn dyslexia... To: EpsilonAurigae@yahoogroups.com From: phxjeff@... Date: Sun, 2 May 2010 17:06:51 -0700 Subject: Re:...
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thierry garrel
gabalou@...
May 6, 2010 9:32 pm
Hello Jose, Robin and all esp aur observers. Here you'll find spectra from May, 6 th. the blue wing is still there, dimming a little. It is more easy to see it...
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Robin Leadbeater
niborl2000
May 6, 2010 10:24 pm
Thanks Thierry, Daylight observing is worth a try if you can find the target. As an experiment last summer I tried to follow eps Aur into daylight in the...
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Jeff Hopkins
hposoft
May 7, 2010 9:15 pm
A complete archive of all submitted UBVRI photometric data as of 05 May 2010 is now available on the Campaign Web Site. There are 3,767 records with over...
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Robin Leadbeater
niborl2000
May 9, 2010 2:11 pm
The intensity of the neutral Potassium absorption line at 7699A in the spectrum of eps Aur is currently dropping which may be a precursor to the anticipated...
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Jeff Hopkins
hposoft
May 9, 2010 6:16 pm
I have posted the latest (as of 09 May 2010) Composite plots of UBVRI data. The system appears to be on a brightening trend that may indicate the start of the...
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Stan Gorodenski
stanlep@...
May 9, 2010 9:23 pm
Attached is a profile of Epsilon Aurigae I took of the Sodium D line region on the night of May 7-8, Arizona time. The estimates of the D line wavelengths are...
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Robin Leadbeater
niborl2000
May 9, 2010 10:52 pm
Thanks for your efforts to get that one Stan. Could you also send me the spectrum in a digital format eg the Vspec spc file. I am interested in zooming in on...
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Jeff Hopkins
hposoft
May 10, 2010 12:19 am
Very nice Stan! See you next week at SAS. Jeff Hopkins Phoenix Observatory Counting Photons Phoenix, Arizona USA www.hposoft.com/Astro/astro.html ...
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Robin Leadbeater
niborl2000
May 11, 2010 1:13 pm
As promised, attached is a quick analysis of what has been happening in the Na D lines since February. I combined Stan's results with one I took in April,...
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Robin Leadbeater
niborl2000
May 11, 2010 5:09 pm
Hello Thierry, Take care when interpreting the EW trend of superimposed lines from two components like we have here. The EW can increase even when the...
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Robin Leadbeater
niborl2000
May 12, 2010 3:51 pm
I have made an animation and false colour plot of the evolution of this absorption line from March 2009-April 2010. ...
