Possible Supernova PSN J22401702-0225341 in MCG-1-57-21 Narrowfield L - Dec 8

Possible Supernova PSN J22401702-0225341 in MCG-1-57-21 Narrowfield L - Dec 8, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen east of the nucleus at Mag 15.2 L
DISCOVERY
Koichi Itagaki: 2012.12.6.383; Mag 15.6
TECHNICAL INFORMATION
Total exposure 60 min (4 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2012.12.8.099
Astrometry: RA 22 40 17.03 Dec -02 25 34.0
Photometry: 15.23 +/- 0.16 L (V for 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.