[vsnet-alert 15804] CP Dra outburst

[Denis Denisenko]

Brendan Martin has reported to ISN-chat mailing list at 13:07 UT on
June 05 that "on the last two nights an object has appeared at j2000
r.a.10 15 40.04 dec. 73 26 04.7" on the images of NGC 3147 field.
However, no magnitudes and exact time of observations were given.
Obviously the object is the dwarf nova CP Draconis (catalogue position
10 15 39.84 +73 26 05.0) in outburst.

The confirmation image has been obtained with MASTER-Amur robotic
telescope (60 sec exposure starting on 2013-06-05 16:20:14 UT). CP Dra
is indeed in outburst. The magnitude measured by the robot (unfiltered
with the red zero point) is 15.52+/-0.04.

CP Dra
  20130605.681  15.52C  MASTER-Amur

According to Ritter-Kolb Catalogue of cataclysmic binaries, this
variable goes into superoutburst from 20m to 14.3m about every 230
days with the normal outbursts as bright as 15.1m.

Denis Denisenko
Member of MASTER team at SAI MSU