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On Thu, 17 Jul 2003 14:19:18 +0100 in Re: Re: V1363 Cyg,
"Gary Poyner" <garypoyner@blueyonder.co.uk> wrote:
> How and when was it confirmed to be a CV?
Hi Gary,
See the following old VSNET message from T. Kato.
Regards,
Daisaku Nogami
-----------------------------------------------------------
Date: Fri, 13 Sep 1996 14:58:56 +0900
From: tkato@sanma.kusastro.kyoto-u.ac.jp (Taichi Kato)
Subject: [vsnet-obs 3769] on V1363 Cyg
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.
Regards,
Taichi Kato
Return to the Powerful Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
