Possible Supernova PSN J07310540+5756108 in MCG +10-11-68 or PGC 21194 Narrowfield L - Sept 8, 2013

Possible Supernova PSN J07310540+5756108 in MCG +10-11-68 or PGC 21194 Narrowfield L - Sept 8, 2013, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen south-west of the nucleus at Mag 18.0 L. Probably fading.
DISCOVERY
MASTER Robotic Net: 2013.9.6.814; Mag 16.7
TECHNICAL INFORMATION
Total exposure 15 min (3 x 5 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2013.9.8.477
Photometry: 18.00 +/- 0.07 L (V as ref)
Astrometry: RA 07 31 05.38 Dec +57 56 10.9
These data were collected remotely using a 51-cm RCOS and STL11K camera at New Mexico Skies, Mayhill, New Mexico by Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia.
FITS file available on request from jbrimaco@bigpond.net.au