[vsnet-alert 14968] MASTER OT J054317.95+093114.8

[Denis Denisenko]

Dear all!

Pavel Balanutsa has discovered yet another bright CV (the second one
in 3 hours!) in MASTER-Amur data of Sep. 30. This one is in Orion. It
was named MASTER OT J054317.95+093114.8 and announced in Astronomer's
Telegram ATel #4446 <http://www.astronomerstelegram.org/?read=4446>.
The amplitude of outburst is more than 7m. Unfiltered magnitude with
the red zero point was 13.3-13.4, and there is nothing at this
position in DSS plates to 21m. The 10'x10' color combined (BRIR)
finder chart is uploaded to
http://master.sai.msu.ru/static/OT/J0543+0931-BRIR.jpg

I have obtained confirmation images from MASTER-Tunka telescope
simultaneously in two tubes with two filters (V and I). The image
quality in Tunka was worse than Amur images 2 nights ago, so the
photometry is only good to 0.1m. However, it definitely shows that the
object is blue which means it is a dwarf nova rather than classical
Nova.

The photometry follows.

MASTER OT J054317.95+093114.8
  20120930.755  133CR MASTER-Amur
  20120930.785  134CR MASTER-Amur
  20121002.764  142V  MASTER-Tunka
  20121002.764  143I  MASTER-Tunka

The Moon is 45 deg away and approaching yet closer in the next 3
nights. Hopefully someone will be able to obtain time series for this
object, too!

Denis Denisenko