[vsnet-alert 15924] New UGWZ candidate in Lyra by MASTER (13.9m)

[Denis Denisenko]

Sergey Shurpakov has found a new large-amplitude dwarf nova in
MASTER-Amur images. It was just published in ATel #5196, see
http://www.astronomerstelegram.org/?read=5196

MASTER OT J181953.76+361356.5
  20130522.849  <183C   MASTER-Kislovodsk
  20130705.630  13.92C  MASTER-Amur
  20130705.659  13.99C  MASTER-Amur

The object at minimum has a blue magnitude jmag=21.58 in GSC 2.3.2.
Color-combined DSS finder chart:
http://master.sai.msu.ru/static/OT/J181953+361356-BRIR5x5.jpg (200%
zoom). There is also an UV counterpart GALEX J181953.9+361358
(FUV=22.39+/-0.27 NUV=21.76+/-0.19).

Discovery and reference images:
http://master.sai.msu.ru/static/OT/181953.76361356.5.png

No previous outbursts were detected on DSS plates, in NEAT images, by
Catalina Sky Survey and in MASTER database. Object is most likely a
rarely outbursting dwarf nova of WZ Sge (UGWZ) subtype. Time-resolved
photometry is strongly encouraged.

The new variable is located in Lyra, 10' North of the bright star
kappa Lyrae and 0.5' W 0.6' N of TYC 2635-1196-1 (V=9.77, B=10.93). It
currently culminates 40 minutes before the local midnight.

Denis Denisenko
Member of MASTER team at SAI MSU