Possible Supernova PSN J12255692-0358388 in PGC 157753 Narrowfield L - May 20, 2013

Possible Supernova PSN J12255692-0358388 in PGC 157753 Narrowfield L - May 20, 2013, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen east-south-east of the nucleus at Mag 16.2 L. Brightened by 0.14 Mag in 24 hours.
DISCOVERY
Catalina Real-Time Transient Survey: 2013.5.18.150; Mag 17.3
TECHNICAL INFORMATION
Total exposure 50 min (100 x 0.5 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2013.5.20.316
Astrometry: RA 12 25 56.73 Dec -03 58 40.0
Photometry: 16.24 +/- 0.05 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.
FITS file available on request from jbrimaco@bigpond.net.au