[vsnet-ecl 4375] Fw: [Aavso-photometry] Zeta Aurigae Campaign 2011

[K.Nagai]

FWI


----- Original Message -----
>From: Jeff <phxjeff at hposoft.com>
>To: EpsilonAurigae at yahoogroups.com, staranalyser at yahoogroups.com,
>        spectro-l at yahoogroups.com,
>        aavso-photometry Photometry <aavso-photometry at mira.aavso.org>,
>        astronomical_spectroscopy at yahoogroups.com,
>        RSpec_Real_Time_Spectroscopy at yahoogroups.com
>Date: Thu, 1 Sep 2011 12:07:04 -0700
>Cc: "Philip D. Bennett" <pbennett at ap.smu.ca>
>Subject: [Aavso-photometry] Zeta Aurigae Campaign 2011
>
>
>Dear Colleagues,
>
>The Zeta Aurigae Campaign web site is now up. I welcome comments,  
>suggestions and any problems/errors found.
>See:
>
>http://www.hposoft.com/EAur09/zeta%20Aurigae/zeta.html
>
>The current prediction for first contact is 29 October 2011. It turns  
>out the 19 November 2011 date is for mid-eclipse. It is suggested  
>concentrated observing efforts begin the week before 29th October 2011  
>and follow through until at least 17 December 2011. Please send data  
>and comments directly to me for now.
>
>Phil Bennett has responded to my inquiry about zeta Aurigae. He has  
>done a great deal of work on this star system. A paper by him can be  
>found at:
>
>1996 Astrophysical Journal Paper by Philip Bennett, et. al.
>http://www.hposoft.com/EAur09/zeta%20Aurigae/Doc/1996BE.PDF
>
>Phil's message:
>
>Hi Jeff,.
>
>Thanks for the update on zeta Aur. I am very pleased to see the
>attention you and your fellow observers are devoting to this interesting
>and useful binary system.
>
>I am particularly interested in spectra. The best region is in the blue-
>violet-near UV (3200-4250 A). Shorter wavelengths are more useful, but
>also more difficult to observe). It is probably impossible for most
>amateurs to observe below 3500 A because regular optical glass absorbs
>strongly at wavelengths shorter than this (special optics made of fused
>silica optics are needed).
>
>The key times to observe are nightly for the 2 weeks prior to the start
>of eclipse, during total eclipse, and for the 2 weeks following
>emergence from eclipse. Spectroscopic signatures of the supergiant's
>atmosphere remain visible for +/2 weeks from total eclipse.
>
>If you have any amateurs able to observe in the blue-violet-near UV on a
>regular basis,  I would be *very* interested in hearing from them
>directly.
>
>Cheers,
>Phil
>
>
>Jeff
>Hopkins Phoenix Observatory
>(187283)
>Counting Photons
>Phoenix, Arizona USA
>www.hposoft.com/Astro/astro.html
>International Epsilon Aurigae Campaign
>http://www.hposoft.com/Campaign09.htm
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