[vsnet-alert 17015] MASTER OT J200904.69+825153.6 - new UGSU candidate (15.5m)

[Denis Denisenko]

Another large-amplitude dwarf nova in Draco was found by Vladimir
Vladimirov in MASTER-Amur data from Mar. 10th. The images were
obtained just 12 minutes after the object discovered by P. Balanutsa!
It has nearly the same outburst magnitude, and it was published in the
same ATel #5974.

MASTER OT J200904.69+825153.6
  20140310.5933  15.67C  MASTER-Amur
  20140310.5944  15.58C  MASTER-Amur
  20140310.5956  15.57C  MASTER-Amur
  20140310.6247  15.55C  MASTER-Amur
  20140310.6259  15.53C  MASTER-Amur
  20140310.6270  15.46C  MASTER-Amur
Internal photometric errors are 0.06m

There is a faint (~22.5m) blue star at the position of the OT on the
sum of digitized Palomar plates. Color-combined DSS finder chart
(3xBRIR): http://master.sai.msu.ru/static/OT/J200904+825153-BRIR5x5.jpg
(2x zoom)

There is an UV counterpart GALEX J200904.5+825153 with two entries in
GALEX catalogue with different magnitudes: FUV=18.01, NUV=18.05 and
FUV=18.71, NUV=18.73. The star was probably caught in outburst during
the observations by GALEX.

Outburst amplitude is about 7m! Time-resolved photometry is strongly encouraged.

MASTER discovery and reference images:
http://master.sai.msu.ru/static/OT/200904.69825153.6.png

Denis Denisenko
Member of MASTER team at SAI MSU