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THE ASTRONOMER Electronic Circular No 2728      2011 Apr 05 19.23UT
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 4076 = PSN J12043294+2012114
Ron Arbour advises us of his discovery of an apparent supernova of 
magnitude 17.3 in the galaxy NGC4076 during searches for the UK 
Nova/Supernova Patrol. The message was delayed in reaching the editor 
due to the discoverer having a PC fault. However a report was sent to 
Dan Green on 2011 April 2 relaying the object was found on an unfiltered 
CCD images the first being taken on 2011 Apr 01.9579UT using a 0.35-m 
f/6 Schmidt-Cassegrain and Starlight Xpress CCD camera.
The object was also recorded on several subsequent images to a limiting 
unfiltered magnitude of approx. 18.8.

The object is located at: 12h 04m 32.94s +20° 12' 11.4" (2000),
offsets from galaxy: 5.8" E 6.5" S.

The object is not visible on the Digitised Sky Survey POSS II Blue
plate 1990-03-22 or the POSS II Red plate 1997-03-09 LM about 20.0. No 
similar object was found within a 15 arc min. radius of NGC 4076 using 
CBAT' Minor Planet Checker.

Following posting on the Transient Objects Confirmation Page (TOCP) by 
Tom Boles, it was assigned the temporary designation:
PSN J12043294+2012114

TOCP carries a further note of this object by Joseph Brimacombe, Coral 
Towers Observatory, Cairns, Australia on Apr 3.172UT. He comments:
This possible supernova in NGC 4076 was easily seen with 8 x 600 sec 
images using a clear filter. Astrometry: RA 12 04 32.98 Dec 20 12 10.6 
Photometry: Mag 17.90 +/-0.23 CR using 4 ref stars. These data were 
collected remotely using a 51 cm RCOS and STL11K camera at Mayhill, New 
Mexico

Spectroscopic confirmation of the object is awaited.

Guy M Hurst