Possible Supernova MASTER OT J154156.81+105552.0 in USNOA2 0975-07939773 Narrowfield L - July 4, 2013

Possible Supernova MASTER OT J154156.81+105552.0 in USNOA2 0975-07939773 Narrowfield L - July 4, 2013, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen at Mag 18.2 L. Measurements include light from Mag 18.05 V host
DISCOVERY
MASTER Robotic Net: 2013.6.28.805; Mag 18.0
TECHNICAL INFORMATION
Total exposure 45 min (3 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2013.7.4.273
Astrometry: RA 15 41 56.82 Dec +10 55 51.7
Photometry: 18.20 +/- 0.31 L (V as ref)
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