[vsnet-alert 16838] MASTER OT J072351.31+635526.2 likely superoutburst

[Denis Denisenko]

This dwarf nova in Camelopardalis discovered by MASTER-Amur in March
2012 (see ATel #4001, <http://www.astronomerstelegram.org/?read=4001>)
is again in outburst on MASTER-Kislovodsk unfiltered survey images:

MASTER OT J072351.31+635526.2
  20140129.813  15.62C  MASTER-Kislovodsk
  20140129.814  15.58C  MASTER-Kislovodsk
  20140129.815  15.69C  MASTER-Kislovodsk
  20140129.844   160C   MASTER-Kislovodsk
  20140129.845   158C   MASTER-Kislovodsk

Previous outbursts:
  20110326.456   156C   MASTER-Amur
  20110326.488   158C   MASTER-Amur
  20120318.474   157R   MASTER-Amur (discovery outburst)
  20120318.506   160R   MASTER-Amur
  20121205.686   159C   MASTER-Amur
  20121205.717   158C   MASTER-Amur
  20131226.648   158C   MASTER-Amur
  20131226.685   159C   MASTER-Amur

The star was faint on the 1st epoch blue Palomar plate of 1953-03-08
and bright on the 2nd epoch plate of 1997-03-09. This resulted in the
following USNO-B magnitudes:

USNO-B1.0 1539-0154845 (07 23 51.345 +63 55 26.64 B1=20.67 B2=15.93 R2=20.91)

Comparison of POSS-I and POSS-II blue plates (5'x5' FOV):
http://master.sai.msu.ru/static/OT/J072351+635526-POSS-B.jpg

There is also an UV counterpart in GALEX data release 6:
GALEX J072351.3+635526 (FUV=20.86+/-0.29 NUV=21.15+/-0.27)

This area of sky is not covered by SDSS. Orbital period is unknown.
Time resolved photometry is welcome.

Denis Denisenko
Member of MASTER team since April 2012