[vsnet-alert 9176] New DN in Cam (OT_J055718++683226) confirmed

[uemuram at hiroshima-u.ac.jp]

New DN in Cam (OT_J055718++683226) confirmed

    We started a time-series observation of this new dwarf nova 
at about 13:30 UT.  After our preliminary reduction, we have 
confirmed superhumps with a very short period of 0.053(1) d.  
Sample light curves and images can be seen at:

http://home.hiroshima-u.ac.jp/hasc/kanata/j0557/index.html

We will update this page later.

The humps have a single peak.  It indicates that they 
are not "early humps" which are usually observed in a very early 
phase of WZ Sge-type outbursts.  So, the object could be a 
WZ Sge-type dwarf nova, but it would not be in a very early 
phase of the superoutburst. 

If this is a real superhump period, it is the shortest one in 
SU UMa stars (cf. Imada et al. 2006, PASJ, 58, L23).  

Time-series observations are encouraged.

Regards,
Makoto Uemura and Akira Arai
Hiroshima University, Japan