The possible outburst/brightening of V1363 Cyg, reported by Gary Poyner, has been confirmed by CCD at the CBA Belgium (25-cm f/6.3 SCT and ST-7 CCD). The CCD images were obtained under very poor conditions (strong winds, clouds), but clearly show the presence of a faint object. A rough analysis of an unfiltered CCD image, obtained at 23h19m UT (Sep 12, 1996) yields a magnitude of 16.5 (using the 15.60 comp. star on the TA sequence).
V1363 Cyg is not visible on earlier CCD images, obtained at the CBA Belgium, although they have a similar limiting magnitude. This further proves the reality of the object.
The Outburst Activity Database on Selected Cataclysmic Variables contains no entries on past outbursts of this object.
V1363 Cyg (=VV 279)
Tonny Vanmunster wrote in vsnet-obs #3765:
> V1363 Cyg is not visible on earlier CCD images, obtained at the CBA Belgium, > although they have a similar limiting magnitude. This further proves the > reality of the object. > > The Outburst Activity Database on Selected Cataclysmic Variables contains no > entries on past outbursts of this object.
According to the discovery paper (Ric. Astr. Vol. 8, No. 10), V1363 Cyg showed very peculiar behavior unlike other dwarf novae.
JD magnitude (+2400000) ---------------------------------------------------------------------- around 32400: fainter than 17.5 around 32600: observed at 13-14 for about 40 days then faded again to 16-<17.5 32950: started to brighten slowly 33000-33200: 14-15 mag then slowly faded to mag 17 around 33600 33980: started to brighten, reaching a maxium of 13.5 around 34000 34100: 15-16 mag 34150: 13.5, then faded to around 34200: 14-14.5 34220: faded further to mag 16 34230: brightened again to mag 14 then faded very slowly to mag 18 around 35000
From the time-scale of variations, the object looks like an anti-dwarf nova (like MV Lyr and KR Aur) rather than usual Z Cam stars. Spectroscopic observation by Bruch and Schimpke 1992 (A&AS 93, 419) confirmed its cataclysmic nature. Recent faint state of this object is remniscent of the "superminimum" of MV Lyr. The ROSAT Bright Source J2006.2+2342 may be identified with this CV. Close follow-up observations are urged to see if the star may become active again.
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