-------------------------------------------------------------------
THE ASTRONOMER Electronic Circular No 2896      2013 Feb 24 15.31UT
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
-------------------------------------------------------------------
MASTER OT J173432.51+434219.4
P. Balanutsa et. al., Moscow State University reports on The 
Astronomer's Telegram 4837 the MASTER-Amur auto-detection system 
discovery of an Optical Transient (OT) at:
RA 17h 34m 32.51s DEC +43 42' 19.4" (2000) on 2013 Feb 23.785UT.

The OT unfiltered magnitude is 15.9 (limiting magnitude 17.8).
It is seen on two images and there is no minor planet at this position. 
An earlier reference image of 2012 Oct 19.418UT did not show the OT to a 
magnitude limit of 18.5.

The object is not present in 2MASS, USNO-B1.0, GALEX, 1RXS and GCVS 
catalogs, as well as in AAVSO VSX. It was not visible on three 
Palomar/NEAT images taken on 1998 June 24. There is nothing at this 
position on nine digitized Palomar plates nor SDSS colour-combined image 
to limiting mag ~23. There are no previous detections in CRTS Data 
Release 2.

Based on the amplitude of more than 7 magnitudes they conclude that 
MASTER OT J173432.51+434219.4 is a new cataclysmic variable (dwarf nova) 
of UGWZ or UGSU subtype in superoutburst.

The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/173432.51434219.4.png


Denis Denisenko, MASTER team comments MASTER OT J173432.51+434219.4 has 
observations as follows:
   20130223.757  157C  MASTER-Amur
   20130223.786  159C  MASTER-Amur
and that the object might be of the WZ Sge type.


SUPERNOVA 2013G IN NGC 3947 (CSS)
2013G   Jan  5.43   11 53 21.32  +20 45 10.0  16.0  14.0"E    3.8"N
G. H. Marion: spectrum Jan 6 type-Ia a few days before maximum.

SUPERNOVA 2013H IN ESO 36-G19 (PARKER)
2013H   Jan  6.56   09 06 30.70  -75 49 01.5  16.5R 18  "W   34.0"N
Parker's image can be viewed at: http://tinyurl.com/b2h5rj2
N. Morrell: spectrum Jan 7 type-Ia about a week before maximum

SUPERNOVA 2013I (KISO SUPERNOVA SURVEY)
2013I   Jan 11.41   02 49 42.17  +00 45 35.7  18.6   8.8"W    0.3"S
M. Stritzinger: spectrum Jan 15 type-Ia similar to SN 2005gj

SUPERNOVA 2013J (KISS COLLABORATION)
2013J   Jan 19.77   11 12 50.30  +28 04 19.7  18.8   1.5"W    5.5"N
F. Taddia: spectrum Jan 21 type-Ic around maximum

SUPERNOVA 2013K IN ESO 9-G10 (PARKER)
2013K   Jan 20.41   17 39 31.54  -85 18 38.1  17.7R  6  "E    1  "S
Parker has posted an image at: http://tinyurl.com/acupbro
F. Taddia: spectrum Jan 22 type-IIP a few days past maximum

Guy M Hurst