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[vsnet-obs 894] some about CI UMa
- Date: Sun, 6 Aug 1995 06:22:58 +0900
- To: vsnet-obs
- From: tkato@kusastro.kyoto-u.ac.jp
- Subject: [vsnet-obs 894] some about CI UMa
- Reply-To: vsnet-obs@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
CI UMa (UGSU)
Following a request from T. Vanmunster, I would like to make some comments
on this object, though my information is a little old.
This dwarf nova was discovered by Granskiij and Kolotovlina (in Pererm.
Zvezdy). They gave seemingly complete description of the outburst behavior.
JD mpg duration
2441392 14.3 faded by one mag in a day, but then brightened again
on 41394, followed by a linear decline until 41400
17.0 mag on 41411
41533 14.8 stayed at maximum for five days.
41573 15.6 single plate
41747 15.3 >3
42097 14.7 >2
42128 15.6 single plate
42457 14.6 >4
42485 15.5 >2
42751 15.7 single plate
42890 14.9 >3
42926 15.2 >3
This object has been included in VSOLJ program since ~1987. A long
outburst was observed in Jan. 1988. Serveral other outbursts have been
recorded mainly by M. Koshiro.
A photometric period of 87 min in quiescence was detected by Howell et al.
(PASP 102, 758). During a bright outburst last year, superhumps were finally
discovered by Nogami et al. (Would you please give more details? >Nogami-san)
Regards,
Taichi Kato
PS. Sorry, not Granskiij, but Goranskiij.