[vsnet-alert 9705] ROTSE3 J031031+431115: superoutburst?

[Taichi Kato]

   The light curve of ROTSE3 J031031+431115 seems to suggest
a superoutburst.  Although the object is a bit faint, we still
have a chance to detect superhumps.  ROTSE3 J113709+513451
seems to be an SS Cyg-type outburst.

===

ATEL #1272                                                           ATEL #1272

Title:          Discovery of two possible CVs ROTSE3 J031031+431115 and ROTSE3
                J113709+513451
Author: F. Yuan, J. Aretakis, C. Akerlof, T. Mckay (U. Mich.) and
                E. Rykoff (UCSB) report on behalf of the ROTSE collaboration
Queries:        yuanfang at umich.edu
Posted: 12 Nov 2007;  23:18  UT
Subjects:       Optical, Cataclysmic Variables, Transients

We report the discovery of two optical transients, ROTSE3 J031031+431115
and ROTSE3 J113709+513451 in unfiltered CCD images taken by the 0.45m ROTSE-IIIb
telescope at McDonald Observatory, Texas.      

The first object, located at RA: 03:10:31.24 Dec: 43:11:14.6 (J2000, uncertainty
<1") was observed at 17.0 mag on Sep 7.42 UT, 17.0 mag on Oct 19.26 UT
and 18.0 mag on Oct 20.26 UT. Before November and other than the reported
dates, it is below our detecting limit from about 17th to 19th mag. More
recently, it was observed at 18.4 mag on Nov 1.24 UT, rose to 16.4 mag
on Nov 8.23 UT and then decayed to 17.0 mag on Nov 12.20 UT.  This transient
has a R~19.1 counterpart in USNO-B1.0 catalog. According to the crude photometry
of the USNO-B catalog, it is bluer than nearby field stars and thus is
tentatively categorized as a galactic CV. More information including finding
chart and light curves can be found at: http://rotse.net/transients/j0310+4311/index.html

The second object, located at RA: 11:37:08.65 Dec: 51:34:51.1 (J2000, uncertainty
<1') was observed to rise from 18.3 mag to 17.2 mag on Nov 2.64 UT to Nov
3.46 UT and then decayed to 18.5 mag on Nov 12.44 UT. It was not detected
to limiting mag of about 18 before the first detection. This transient
has a r~20.1 counterpart in SDSS which is blue according to SDSS color
measurements. It is also tentatively categorized as a galactic CV. More
information including finding chart and a light curve can be found at:
http://rotse.net/transients/j1137+5134/index.html