[vsnet-alert 9876] CSS080130:033055-251255: follow-up observation

[uemuram at hiroshima-u.ac.jp]

CSS080130:033055-251255: follow-up observation

  We observed this new optical transient reported to ATEL
(http://www.astronomerstelegram.org/?read=1374).
We confirmed the outburst of the object.

YYYYMMDD(UT)     mag. err.
20080201.51352 17.37V 0.17 Higashi-Hiroshima Observatory

http://kanatatmp.blogspot.com/search/label/J0330

In conjunction with the discovery magnitude (16.7mag on 30 Jan),
the fading rate is about 0.3 mag/day. 
We also took J-band images, and the color is calculated to be 
about V-J=+0.1 +/- 0.4.  

These results imply that this new object is a dwarf nova in 
outburst (UGSS type, or very early phase of a WZ Sge-type outburst), 
while spectroscopic observations are needed to determine its nature. 

Regards,
M. Uemura, A. Arai, and M. Sasada
on behalf of the KANATA team
Hirohsima University