Possible Supernova CSS130513:151139+200912 near USNOA2 1050-07424669 Narrowfield L - May 17, 2013

Possible Supernova CSS130513:151139+200912 near USNOA2 1050-07424669 Narrowfield L - May 17, 2013, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN just seen at Mag 18.6 L. Measurements include light from assumed host not seen on DSS2 image
DISCOVERY
Catalina Real-Time Transient Survey: 2013.5.13; Mag 19.62
TECHNICAL INFORMATION
Total exposure 80 min (8 x 10 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2013.5.17.179
Astrometry: RA 15 11 38.96 Dec +20 09 12.2
Photometry: 18.60 +/- 0.21 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