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THE ASTRONOMER Electronic Circular No 2922      2013 Jun 19 18.19UT
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 J194147.00+531847.7 - BRIGHT CATACLYSMIC VARIABLE
P. Podvorotny et. al., Moscow State University, report on 'The Astronomer's
Telegram' 5134 their discovery of an optical transient (OT) with the
MASTER-Amur auto-detection system. The object is located at:
RA 19h 41m 47.00s DEC +53d 18m 47.7s and was recorded on 2013 June 15.585UT
on two images. The OT unfiltered magnitude is 15.6 (limit 18.0m). They have
a reference image without the OT on 2012 July 27.591UT with unfiltered
magnitude limit 19.0m. 

This area of sky is not covered by SDSS, GALEX and CRTS and nothing is shown
at this position in USNO-A2.0, USNO-B1.0, GSC, 1RXS, GCVS and AAVSO VSX.
Based on the outburst amplitude being more than five magnitudes they suggest
that MASTER OT J194147.00+531847.7 is a new cataclysmic variable, probably a
dwarf nova of the UGSU subtype. 

The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/194147.00531847.7.png

SUPERNOVA 2013bn (CATALINA REALTIME TRANSIENT SURVEY)
2013bn  Apr 15.34   11 48 02.03  +54 34 38.6  17.9
L. Tomasella: spectrum Apr 18 with Asiago 1.82-m Copernico Telescope shows
type-Ic hypernova, similar to SN 1998w, about 10 days after maximum.

SUPERNOVA 2013bo (CATALINA REALTIME TRANSIENT SURVEY)
2013bo  Apr 15.36   13 17 29.19  +42 44 29.6  17.6
L. Tomasella: spectrum Apr 18 with Asiago 1.82-m Copernico Telescope shows
type-Ia about one week after maximum.

SUPERNOVA 2013bp (CATALINA REALTIME TRANSIENT SURVEY)
2013bp  Apr 15.33   12 19 04.88  +42 24 53.9  18.6
L. Tomasella: spectrum Apr 18 with Asiago 1.82-m Copernico Telescope shows
type-Ia, about 10 days after B-band maximum.

SUPERNOVA 2013bq (CATALINA REALTIME TRANSIENT SURVEY)
2013bq  Apr 15.36   13 04 08.45  +43 54 07.7  18.3
L. Tomasella: spectrum Apr 18 with Asiago 1.82-m Copernico Telescope shows
type-Ia about 5 days before maximum.

SUPERNOVA 2013br (CATALINA REALTIME TRANSIENT SURVEY)
2013br  Apr 14.22   11 21 30.88  -03 31 02.8  18.2            1.0"N
N. Morrell: spectrum Apr 16 young type-II supernova. 

SUPERNOVA 2013bs IN NGC 6343 (CATALINA REALTIME TRANSIENT SURVEY)
2013bs  Apr 18.48   17 17 22.03  +41 04 00.2  17.0  65.1"E   50.3"N
L. Tomasella: spectrum Apr 19 with Asiago 1.82-m Copernico Telescope shows
type-Ia a few days before maximum.

Guy Hurst reports that an image with the Bradford Robotic Telescope
(60-second exposure) 2013 May 11 did not show the object to a limit of
15.7V.

Guy M Hurst