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THE ASTRONOMER Electronic Circular No 2889      2013 Jan 22 13.35UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK      Backup: gmh@wdcc1.bnsc.rl.ac.uk
WORLD WIDE WEB                         http://www.theastronomer.org
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MASTER OT J231025.12+380037.5 NEW BRIGHT CV
S. Shurpakov (Moscow State University) et. al., report on The 
Astronomer's Telegram 4749 that the MASTER-Kislovodsk auto-detection 
system recorded an Optical Transient (OT) source at:
RA 23h 10m 25.12s DEC +38d 00' 37.5" on 2013 Jan 18.685UT.
The OT unfiltered magnitude is 16.0m (limit 18.4m).

The OT is seen on two images and there is no minor planet at this place. 
They have a reference image without the OT on 2012 Sept 16.864UT with an 
unfiltered magnitude limit of 20.0

There is nothing at this position in 2MASS, USNO-B1.0, GALEX and 1RXS 
catalogs, as well as in GCVS and AAVSO VSX. No previous outbursts were 
detected by Palomar/NEAT and CRTS.

The star was in outburst on 1995 August 28 an infrared DSS plate, but at 
quiescence on eight other plates. It is present in GSC 2.3.2 with the 
coordinates 23 10 25.040 +38 00 36.65 and magnitudes jmag=22.06 (at 
minimum), Nmag=16.02 (outburst).

Based on the amplitude of variability and presence of a previous 
outburst we conclude that MASTER OT J231025.12+380037.5 is a new 
cataclysmic variable (dwarf nova) in outburst.

The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/231025.12380037.5.png


SUPERNOVA 2012hl (CSS)
2012hl  Dec  4.11   00 50 17.76  +24 31 52.2  17.4   1.0"E    2.2"S
A. Morales-Garoffolo: spectrum Dec 6 type-Ia a few days before maximum.

SUPERNOVA 2012hm (TNTS)
2012hm  Dec  7.64   02 33 23.32  +39 40 16.9  17.8   5.0"E    4.0"N
J.-J. Zhang: spectrum Dec 9 type-Ia a few days before maximum

SUPERNOVA 2012hn IN NGC 2272 (SSS)
2012hn  Apr  4.41   06 42 42.55  -27 26 49.8  16.5  16.6"E   44.4"N

SUPERNOVA 2012ho IN MCG -01-57-21 (ITAGAKI)
2012ho  Dec  6.83   22 40 17.02  -02 25 34.1  15.6  27  "E    6  "S
K. Takaki: spectrum Dec 6 type-II around maximum and a good match with 
supernova 1999i at - days.

Guy Hurst, using the Bradford Robotic telescope on 2012 Dec 27.83UT 
obtained V photometry based on a sequence by Howerton and derived a 
magnitude of 15.4V.

SUPERNOVA 2012hq (WANG and CHEN)
2012hq  Dec  7.71   02 07 30.49  +44 06 19.3  18.6  10  "W    2  "N
J.-J. Zhang: spectrum Dec 10 type-Ia a few days before maximum

Guy M Hurst