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[vsnet-id 263] V1316 Cygni identification
- Date: Tue, 5 Sep 2000 09:32:06 +1000
- To: vsnet-chat@kusastro.kyoto-u.ac.jp, vsnet-id@kusastro.kyoto-u.ac.jp, aavso-discussion@informer2.cis.McMaster.CA
- From: "Bruce Sumner" <b.sumner@bom.gov.au>
- Subject: [vsnet-id 263] V1316 Cygni identification
- CC: mikesimonsen@mindspring.com, aah@nofs.navy.mil
- In-reply-to: <200008211247.VAA02067@ceres.kusastro.kyoto-u.ac.jp>
- Priority: normal
- Reply-to: b.sumner@bom.gov.au
- Sender: owner-vsnet-id@kusastro.kyoto-u.ac.jp
V1316 Cygni identification
The position of the potential UGSU variable V1316 Cygni shown in
Downes and Shara, PASP, 1993, is incorrect. The real variable is
in fact the faint star (17.58V) some 12 arcsec east of the indicated
star (14.78V). This has been determined from B and V photometry (the
candidate is very blue) and magnitude variation in quiescence, using
photometric data obtained by Henden and Honeycutt for their paper
Secondary Photometric Standards for Northern Cataclysmic Variables
and Related Objects, PASP,109,441,1997.
The J2000 coordinates and magnitudes of V1316 Cygni, taken from the
Henden & Honeycutt dataset, are:
20h 12m 13.67s +42d 45' 51.4" V=17.583 B-V=0.252
Extreme care will be necessary not to confuse the close 14.8V
companion with the variable, particularly when the variable is faint.
Regards
Bruce Sumner
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