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THE ASTRONOMER Electronic Circular No 2970      2013 Dec 17 15.51UT
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 J023929.34+784838.3 - NEW CATACLYSMIC IN CEPHEUS
Denis Denisenko, Moscow State University and others report on 'The
Astronomer's Telegram 5660' the MASTER-Tunka auto-detection system discovery
of an Optical Transient (OT) source at:
RA 02h 39m 29.34s DEC +78d 48' 38.3" on 2013 Dec 13.589UT.
The OT, seen on three images, had an unfiltered magnitude of 16.1m (limit
17.8m). A reference image without the OT on 2011 Nov 30.628UT had an
unfiltered magnitude limit of 19.4m. 

It is identical to USNO-B1.0 1688-0014289 (02 39 29.302 +78 48 38.58
B1=19.79 R1=19.14 B2=17.47 R2=18.99 I=18.72) = USNO-A2.0
1650-00522197 (02 39 29.57 +78 48 38.2 R=17.8 B=19.4). The star has
brightened on 1996 Aug 13 blue Palomar plate, faded on 1996 Aug 21 IR plate
and was detected in bright outburst on 1996 Sep 4 infrared plate.
Color-combined finder chart is uploaded to
http://master.sai.msu.ru/static/OT/J023929+784838-BRIR.jpg

Based on colour, UV detection, amplitude of variability (~3m) and short
outburst cycle implied by 1996 Palomar plates, it seems MASTER OT
J023929.34+784838.3 is a cataclysmic variable, likely a dwarf nova of Z Cam
(UGZ) type in outburst.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/023929.34+784838.3.jpg

SUPERNOVA 2013fy IN ESO 287-G40 (STUART PARKER)
2013fy  Oct 25.41   21 37 27.12  -47 01 54.8  16.5r 11  "W   14  "N 
N. Elias-Rosa: spectrum Oct 27 type-Ia almost a week before maximum

SUPERNOVA 2013fz IN NGC 1578 (STUART PARKER)
2013fz  Nov  2.53   04 23 46.44  -51 35 46.3  15.1r  2  "W   12  "N 
M. Turatto: spectrum Nov 4 type-Ia around maximum

SUPERNOVA 2013ga IN UGC 11895 (EAGLE HILL SN PROJECT)
2013ga  Oct 19.15   22 04 21.53  +39 44 28.5  15.3  10.3"W    3.5"S   
David Sand: spectrum Faulkes North Oct 21 type-Ia ar or before maximum

SUPERNOVA 2013gb IN UGC 4700 (XINGMING SKY SURVEY)
2013gb  Oct 31.85   08 58 52.52  +41 35 00.1  16.7  25.9"E   11.7"N
The discoverers' images have been posted at URL
http://www.xjltp.com/XOSS/XM08BW/XM08BW.htm
M. Yamanaka: spectrum Nov 5 type-Ia two days before B-band maximum
The line velocities of Si II 635.5-nm reach 10000 km/s

SUPERNOVA 2013gc IN ESO 430-20 (CHASE PROJECT)
2013gc  Nov  7.34   08 07 11.88  -28 03 26.3  16.7: 43.3"E   18.0"S
N. Morrell: spectrum Nov 8 type-IIn about two months after explosion

Guy M Hurst