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THE ASTRONOMER Electronic Circular No 3085      2015 Jun 19 19.46UT
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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PSN J15044078+1237436 IN NGC 5837
Ron Arbour reports the discovery of an apparent supernova of magnitude 17.5
in the galaxy NGC 5837 on an unfiltered CCD image taken on 2015 June
16.0281UT during searches for the UK Nova/Supernova patrol. He was using a
0.35-m f/6 Schmidt Cassegrain Telescope and SXVF H9 CCD camera. The object
was also recorded on several subsequent images to a limiting unfiltered
magnitude of 18.1. He measured a precise position for the new object:

RA 15h 04m 40.78s DEC +12 37' 43.6" (2000) offsets: 3" E   16" S

The object was not visible on the Digitised Sky Survey POSS II Blue plate
(1993 March 19) or the POSS II Red plate (1989 Feb 11) nor listed on CBAT's
Minor Planet Checker.

An appeal for spectroscopic confirmation has been posted on the Central
Bureau's webpage under the temporary designation of      PSN
J15044078+1237436.

G. Masi et. al., observed the transient on 2015 June 16.93241UT remotely
using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project
facility, at Bellatrix Astronomical Observatory in Ceccano, Italy.
120-seconds exposures, unfiltered, show the source at mag. 17.7 (R mags for
the reference stars from UCAC-4). They also performed astrometry, getting
the following end figures: 40.76; 43.5 (J2000.0, mean residuals of 0.1" on
both axes). 

Spectroscopic confirmation is awaited.

Guy M Hurst