[vsnet-alert 17221] OV Dra outburst

[Denis Denisenko]

MASTER-Amur has detected this eclipsing short-period UGSU-type dwarf
nova in bright outburst 2 nights ago:

OV Dra = SDSS J125023.85+665525.6
  20140411.5793  <182C   MASTER-Amur
  20140412.6087   152C   MASTER-Amur
  20140412.6099   152C   MASTER-Amur
  20140412.6110   153C   MASTER-Amur

Variability range in AAVSO VSX is 15.8-19 CR.
Light curve from Catalina Sky Survey:
http://nesssi.cacr.caltech.edu/catalina/20010320/103201660304100447p.html

IDs in catalogs:
USNO-A2.0 1500-05606068 (12 50 24.08 +66 55 25.3 R=19.0 B=18.7)
USNO-B1.0 1569-0150209 (12 50 23.829 +66 55 25.96 pmRA=-26 pmDE=12
B1=19.24 R1=19.49 B2=19.04 R2=18.95 I=18.41)
GALEX J125023.8+665525 (FUV=19.54+/-0.17 NUV=19.79+/-0.11)
SDSS J125023.85+665525.6 (u=18.73 g=18.65 r=18.65 i=18.74 z=18.63)
SDSS image, magnitudes and spectrum:
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237651272438710296

Orbital period is 0.058735687d (84.579 min).

Current outburst can be a superoutburst. Sorry for the late report!

Denis Denisenko
Member of MASTER team at SAI MSU