[vsnet-alert 16973] MASTER OT J105545.20+573109.7 - new UGSU candidate (15.5m)

[Denis Denisenko]

Sergey Shurpakov has found new large amplitude dwarf nova in Ursa
Major among MASTER-Tunka transients. It has been published in ATel
#5950 <http://www.astronomerstelegram.org/?read=5950> together with
two fainter CVs.

MASTER OT J105545.20+573109.7
  20140304.748  15.49C  MASTER-Tunka
  20140304.745  15.52C  MASTER-Tunka
  20140304.751  15.43C  MASTER-Tunka
  20140304.793  15.60C  MASTER-Tunka
  20140304.796  15.46C  MASTER-Tunka
Internal photometric errors are 0.04m.

Object at quiescence is identical to the blue star SDSS
J105545.15+573110.1 (u=22.39 g=22.16 r=21.88 i=22.55 z=21.91). There
is also an UV counterpart GALEX J105545.2+573109 (FUV=23.44+/-0.10
NUV=22.75+/-0.07) and X-ray source 2XMM J105545.1+573109 = CXO
J105545.2+573109.

Outburst amplitude is more than 6m. Time resolved photometry is
strongly encouraged.

Denis Denisenko
Member of MASTER team at SAI MSU