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Dear colleagues, I have measured Y Cyg with CCD ST8 (filter R) attached to RF80 on Jul 7, 2003 (52828,38-0,58). The ascending branch is measured (421 points). Light changes are approx. between 1.8-1.2 mag (V-C) to the check star SAO 70575. With best regards Miloslav Zejda ******************************************************** Miloslav Zejda Nicholas Copernicus Observatory and Planetarium in Brno Kravi hora 2, 616 00 Brno, Czech Republic ------------------------------------------------------------------------- phone:420+5 4132 1287 fax: 420+5 412 333 89 privat phone: 420+5 46 22 10 72 mobil phone: 420+721 377 398 zejda@hvezdarna.cz ----- Original Message ----- From: "Taichi Kato" <tkato@kusastro.kyoto-u.ac.jp> To: <vsnet-campaign-ecl@ooruri.kusastro.kyoto-u.ac.jp>; <vsnet-ecl@ooruri.kusastro.kyoto-u.ac.jp> Sent: Sunday, September 21, 2003 2:38 AM Subject: [vsnet-ecl 1069] (fwd) Y Cyg Brighter? > From: DWest61506@aol.com > Date: Sat, 20 Sep 2003 10:03:25 EDT > Subject: [vsnet-chat 6869] Y Cyg Brighter? > > >From a quick review of past observations in the AAVSO database and some > literature sources, Y Cyg usually varies between V=7.3 and 7.9. Y Cyg is an Algol > type eclipsing binary. On Sep 17.104 visually I observed Y Cyg at 6.6 using > AAVSO chart 2039+35aa. On Sep 18.08 I measured Y Cyg at V=6.8 +/- 0.15 > photographically using the same AAVSO chart. As a check star I measured SAO 70575 > which is very close to Y Cyg at V=6.6. SIMBAD gives V=6.65 for SAO 70575. > Based on this check star and others I see no reason to doubt my photographic > photometry. I digitize the images and use MIRA to perform differential photometry. > Someone please confirm if Y Cyg is brighter than normal. > > Thanks, > Doug West > http://hometown.aol.com/dwest61506/index.html
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