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THE ASTRONOMER Electronic Circular No 2319      2007 Mar 22 15.45UT
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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SUPERNOVA 2007av IN NGC 3279
An e-mail was received on the night of 2007 March 20/21 from Ron Arbour 
of Pennell Observatory, South Wonston, England in which he reported a 
possible supernova found in NGC 3279.

The object was detected on an unfiltered CCD image (limit magnitude 
18.0) secured during searches for the UK Nova/Supernova Patrol, on March 
20.8352UT using a 0.30-m f/6.3 Schmidt-Cassegrain telescope and 
Starlight Xpress camera and was of magnitude 15.5.

Further multiple images which recorded it allowed the following position 
to be obtained:
RA 10h 34m 43.17s    DEC +11 11' 38.3" (2000)
Offsets from the galaxy's nucleus:   5.89" E   14.9" S

Ron adds that the object is not visible on the Digitised Sky Survey POSS 
II Blue plate (1996-03-18) or the POSS II Red plate (1993-03-22), nor 
listed on CBAT's Minor Planet Checker.

A further image of March 21.831UT with a limiting magnitude of 19.0 
using the 0.40-m f/5 Newtonian confirmed the presence of the suspect at 
magnitude 15.5 which showed no movement since discovery.

David Briggs also reports confirmation on March 20.873UT with end 
figures: RA 43.17s DEC 37.9" (2000)

The Central Bureau also report that in response to their appeal, G. 
Folatelli and N. Morrell, on behalf of the Carnegie Supernova Project, 
report the confirmation of 2007av in a combination of eighteen Y-band 
images obtained between Mar. 21.24 and
21.27 UT with the 1-m Swope telescope (+ RetroCam) at Las Campanas
Observatory, providing the following measured position for:
RA 10h 34m 43.13s, DEC +11 11' 37.1" (2000)

Congratulations to Ron on the discovery of his 17th supernova.

Guy M Hurst