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THE ASTRONOMER Electronic Circular No 2722      2011 Mar 24 11.30UT
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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APPARENT SUPERNOVA IN IC3862 (PSN J12535343+3605193)
On 2011 March 19, an e-mail was received from Maurice Gavin, Worcester 
Park, England reporting a transient object recorded in the field of 
IC3862 = Arp 265 at magnitude 16.2. It had been noted on unfiltered 
exposures of March 18 from 22h11mUT using a Meade 0.3-m f/3.7 
Schmidt-Cassegrain telescope and SX Lodestar CCD. He added that it was 
noted to be absent from the Sloan DSS and other available images.

As a large number of images became available, initially from Martin 
Mobberley, Denis Buczynski, Ron Arbour, Nick James, Tom Boles and others 
confirming the presence of the transient without movement, it was 
decided to post it on the 'Transients Objects Confirmation Page'. As the 
editor was away for several days due to the loss of a close relative he 
asked Tom Boles to look after the posting to TOCP.

Tom also reported the following to CBAT:
Tom Boles, Coddenham, England, reports the discovery by Maurice Gavin of 
Worcester Park, Surrey, England of an apparent supernova (mag 16.2) on 
an unfiltered CCD image taken on Mar 18.924 with a 0.30-m reflector. 
The new object (measured by Boles) is located at
RA 12h53m53.40s. DEC +36 05'19.6" (2000), which is approximately (0".0 
east/west) 6".6 north of the centre of IC3862.

Martin Mobberley, Cockfield, England, obtained a confirmation image on 
Mar 20.434 with a 51cm GRASII reflector in New Mexico, from which Boles 
measured end figures of 53.43s and 19.3" and a brightening to mag 16.0.

Nothing is visible on Tom's image from 2006 Mar 05 or on Digitised Sky 
Survey Plates (limiting red mag 20.5), from 1990-03-18 and (limiting 
blue mag 21.0) from 1989-03-30.

Subsequently a mobile phone text was received by the editor from Nick 
James and numerous e-mails awaited the editor's return including a 
report from Denis Buczynski and Nick James of an image of Mar 20.849UT 
with a 0.28-m reflector, FLI Maxcam CM9 and Paramount from Portmahomack, 
Scotland yielding end figures 55.39 and 19.4 using 7 UCAC stars with 
residual 0.09"RA and 0.44"DEC. The unfiltered magnitude from UCAC was 
then 15.9. Other reports were received from D. Rich, Hampden, USA and 
Joseph Brimacombe, Cairns, Australia.

Spectroscopic confirmation is now awaited as to the nature of the object 
which at this stage has a temporary designation of:
PSN J12535343+3605193.

The editor is indebted to Tom Boles and Nick James for their liaison and 
valuable assistance in this matter during my absence.

Guy M Hurst