[vsnet-alert 16618] MASTER OT J024847.86+501239.7 (15.6m) - new UGSU candidate

[Denis Denisenko]

I have found new large-amplitude dwarf nova in Perseus in MASTER-Tunka
data from the last night. It was published in Astronomer's Telegram
ATel #5572 together with two other CVs, see
http://www.astronomerstelegram.org/?read=5572

MASTER OT J024847.86+501239.7
  20131111.5149  15.57  MASTER-Tunka
  20131111.5161  15.63  MASTER-Tunka
  20131111.5175  15.75  MASTER-Tunka
  20131111.5475  15.82  MASTER-Tunka
  20131111.5491  15.77  MASTER-Tunka
  20131111.5507  15.72  MASTER-Tunka

Photometric errors of individual measurements are 0.07m, so the
variations by ~0.2m are likely real.

Faint blue star is present near the OT on Palomar plates and in GSC
2.3.2 with coordinates 02 48 48.079 +50 12 38.51 and jmag=22.11.
Color-combined (BRIR) finder chart:
http://master.sai.msu.ru/static/OT/J024847+501239-BRIR5x5.jpg (2x
zoom).
There is also an UV counterpart GALEX J024848.1+501238
(FUV=19.54+/-0.17 NUV=18.86+/-0.07).

Discovery and reference images:
http://master.sai.msu.ru/static/OT/024847.86501239.7.jpg

Time-resolved photometry is encouraged.

Denis Denisenko
Member of MASTER team at SAI MSU