[vsnet-alert 14993] CSS 111006:015052+332622 bright outburst

[Denis Denisenko]

Dear all,

MASTER-Amur robotic telescope has detected a bright outburst of this
dwarf nova discovered by Catalina Sky Survey a year ago. This area in
Triangulum was observed by the same MASTER 2, 3 and 4 nights ago
(likely due to the follow up of bright Nova in M33). The star was as
quiescence on Oct. 6, 7 and 8, so the outburst is fresh and hot.

CSS 111006:015052+332622
  20121006.527  186CR  MASTER-Amur
  20121007.481  179CR  MASTER-Amur
  20121008.472  179CR  MASTER-Amur
  20121010.473  145CR  MASTER-Amur
  20121010.504  146CR  MASTER-Amur

This variable is identical to ROSAT X-ray source 1RXS J015051.8+332622
with the flux 0.040+/-0.013 cnts/s and hardness ratios
HR1=1.00+/-0.22, HR2=0.73+/-0.18 (typical for dwarf novae of UGSU
type). It is also an UV source GALEX J015051.4+332621
(FUV=19.51+/-0.15, NUV=19.43+/-0.11). The star is present in SDSS DR8
as SDSS J015051.52+332621.8 with the following magnitudes: u=17.87
g=18.19 r=18.10 i=18.01 z=17.77.

As far as I know, the orbital period of this CV is unknown. At least
it is not given in AAVSO VSX and in RKCat rev. 7.18. Small SDSS color
indices indicate a little contribution from the secondary component
which means low-mass red dwarf companion and likely a short orbital
period.

The outburst detection was announced in Astronomer's Telegram ATel
#4475 <http://www.astronomerstelegram.org/?read=4475> together with
the discovery of a faint CV in Cygnus. The link to SDSS data on CSS
111006:015052+332622 was not included in the ATel:
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237678894428651750

Denis Denisenko on behalf of the MASTER team