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THE ASTRONOMER Electronic Circular No 2997      2014 Apr 20 10.45UT
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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PSN J14005449+4058596 IN NGC 5410
On 2014 April 19 David Grennan, Raheny, Dublin, notified us that he has
recorded a suspected magnitude 17.3 (unfiltered) supernova in the galaxy NGC
5410 on 2014 Apr 18.92UT during the supernova patrol and relayed a
preliminary report to the Central Bureau. The provisional position measured
was:
RA 14h00m54.49s DEC +40 58 59.6 
12" south of the nucleus

Martin Mobberley, having received an advice from the discoverer, responded
almost immediately. After logging into ITEL and found New Mexico cloudy so
used the new Sierra Nevada Mountains 24" by recording the galaxy. The result
was loaded at:
http://martinmobberley.co.uk/images/psnj14005449+4058596_20140419_mpm.jpg
recording the suspect on April 19.350UT on a 120sec exposure with the 0.61-m
f/6.5 CDK + PL 09000 CCD. He assessed the magnitude as 17.0 using a sequence
by Stan Howerton.

Stan Howerton had earlier recorded it as follows:
2014 Apr 19.148UT 21 x 20 seconds unfiltered exposures with 0.28m f/5 SCT +
CCD. Photometry of 17.0 +/- 0.1 with V as reference. Image:
https://www.flickr.com/photos/watchingthesky/13931569244/

The KAIT team also relayed a marginal pre-discovery detection at ~3 sigma
level by KAIT on April 16.425 UT with mag R~17.3 +/- 0.3, but no detection
on April 14.392 with limiting mag ~17.5, and on April 10.4 with limiting mag
~18.3.

Denis Buczynski, Tarbatness (I81) also recorded it on Apr 19.89374UT with a
Celestron 14 + SBIG ST9XE + Cousins r filter with positional end figures:
RA 54.49s DEC 00.7" magnitude 16.0R.
There may be a spectrum but no announcement of the discovery or its
designation has been issued by the Central Bureau at the time of this
circular.
Guy M Hurst