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Possible Supernova from the Catalina Sky Survey

ATEL # 1521; A.J. Drake, A. Mahabal, S.G. Djorgovski, R. Williams, M.J. Graham (Caltech); E.C. Beshore, S.M. Larson, R.Hill (LPL/UA); E. Christensen (Gemini Observatory);
on 14 May 2008; 9:55 UT
Password Certification: Andrew J. Drake (

Subjects: Request for Observations, Nova, Supernova, Transients

We have detected an optical transient in Catalina Sky Survey (CSS) images obtained at the Mt. Bigelow 0.7m Catalina Schmidt Telescope on 8 May 2008 UT. The transient is unresolved, and at the following J2000 coordinates:

CSS080508:112311+341250 2008-05-08 UT 07:12:06 RA 11:23:10.90 Dec 34:12:51.0 Mag 18.4 Type SN

For finding charts and discovery images please see:

The object is near the edge of galaxy AGC 211492 (z=0.034, g ~ 16.8, r ~ 16.4, i~16.2 (SDSS)). The transient is consistent with a Supernova. The CSS discovery observations consist of four images spanning ~ 30 minutes. The transient was not present in earlier CSS images including those taken on 3rd, 10th 18th and 28th April UT to mag ~20. The transient is not seen in archival DSS or SDSS images covering this location. Both photometric and spectroscopic follow-up is requested.

Stationary CSS optical transients are detected and published as VOEvents in real-time at and in RSS here

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R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates