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THE ASTRONOMER Electronic Circular No 2918      2013 May 31 12.39UT
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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POSSIBLE SUPERNOVA IN NGC 3542
Ron Arbour, South Wonston, England reports the discovery of an apparent
supernova in the galaxy NGC 3542 on an unfiltered CCD image taken on 2013
May 15.9819UT using a 35cm f/6 Schmidt Cassegrain Telescope and SXVF H9 ccd
camera in the course of the UK Nova/Supernova patrol. The object was also
recorded on several subsequent images to a limiting unfiltered magnitude of
about 19.4.

Precise position:  11h 09m 55.67s    +36° 57' 02.5" (2000) 17.5CV
Offsets from galaxy:   3" E   15" N

The object was not visible on the Digitised Sky Survey POSS II Blue plate of
1990 Apr 21 or the POSS II Red plate of 1989 Jan 15.

Seiichiro Kiyota, Tsukuba, Japan also reports it was detected on 180 sec
images with a 0.43-m f/6.8 astrograph + FLI-PL6303E CCD camera + f/4.5 focal
reducer (T21, iTelescope.NET, Mayhill, NM, USA on May 16.1497UT. Photometry:
V = 17.45 and I_c = 17.19. The image is available at:
http://meineko.sakura.ne.jp/ccd/PSN_J11095567+3657025-130516.jpg

David Briggs, Clanfield Observatories, England also confirmed the presence
of the object at V=17.5 on 2013 May 16.9112UT on 10x80sec images secured
with the 0.61-m Newtonian + SBIG STL-1001E CCD.
Astrometry: RA 11h 09m 55.65s DEC +36 57’ 02.7” (2000). 
The object has not been designated by the Central Bureau who are presumably
awaiting spectroscopic confirmation.
Congratulations to Ron on the discovery of his 30th supernova.

Guy M Hurst