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THE ASTRONOMER Electronic Circular No 2931      2013 Jly 21 18.30UT
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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POSSIBLE SUPERNOVA J16162429+5153057
Tom Boles, Coddenham, England, reports the discovery of an apparent
supernova (mag 16.7) on unfiltered CCD images taken on 2013 Jul 18.024 and
18.947 with a 0.35-m reflector during searches for the UK Nova/Supernova
Patrol. The new object is located at:
RA 16h 16m 24.29s DEC +51o 53' 05.7" (2000), which is approximately 4.9"
east and 8.4" south of the centre of the galaxy:
SDSS J161623.74+515313.9. Nothing is present at this position on Tom's
images of 2010 Mar 08 and 2010 Jul 05 (limiting mag 19.5) or on Digitised
Sky Survey Plates from 1992 June 2 (limiting red mag 20.5), and 1990 Apr 25
(limiting blue mag 21.0). 

Nick James obtained a confirmatory image on 2013 July 19.899UT at magnitude
15.8 (unfiltered) using UCAC-3.
He measured a precise position:
RA 16h 16m 24.25s DEC +51 53' 06.0" (2000)

G. Aldering (CRAL) et. al., report on The Astronomer's Telegram 5219 on
behalf of the Nearby Supernova Factory II spectroscopic observation of the
supernova based on spectra (range 320-1000
nm) obtained with the SuperNova Integral Field Spectrograph on the
University of Hawaii 2.2-meter telescope. Classifications were performed
using Superfit or SNID. The type is SN Ia.

Congratulations to Tom on the discovery of his 153rd supernova.

Guy M Hurst