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Hi Mike, I have used the V1316 Cyg identification (and image) as it appears in the living edition of Ronald Downes' Catalog and Atlas of CVs. I furthermore double-checked against the POSS2, and the only thing I can conclude is that my CCD images do not show any new object compared to both sources. You're right regarding the confusion about the true identity of V1316 Cyg (see also Gary Poyner's website on this). The id in Downes' catalog is based on a message by Bruce Sumner, that appeared in vsnet-id 263, which I reproduce hereunder. I guess his 'evidence' is clear. Best regards, Tonny Vanmunster CBA Belgium Observatory www.cbabelgium.com <<vsnet-id 263>> 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 -----Original Message----- From: owner-vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp [mailto:owner-vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp]On Behalf Of Mike Simonsen Sent: zondag 21 september 2003 22:18 To: Tonny.Vanmunster@cbabelgium.com; Taichi Kato; vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp; vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp Subject: [vsnet-outburst 5912] Re: [vsnet-campaign-dn 3953] V1316 Cyg outburst? -- needs confirmation Tonny, There is a bit of disagreement amongst some as to whether V1316 Cyg is a close companion to the star at 20 12 12.7 +42 45 54 ...or is in fact this star. I note that several BAAVSS observers still track observations of this star as "comp 148". My impression has been that this star has been brighter than usual the last two times I observed it. Hence the note attached to my observation "CYGV1316 030921.1688 14.6: SXN 148 COMP OR VAR?" Sumner identifies V1316 Cyg as- Position: 20 12 13.67 +42 45 51.4 (J2000, in .dat file) Magnitude: V=17.583 B-V=0.252 (in .dat file) I have no personal stake or strong opinion in the matter. Just thought I would bring it up, just in case. Mike Simonsen
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