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A CSS Supernova Candidate

ATEL # 1566; 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 8 Jun 2008; 9:00 UT
Password Certification: Andrew J. Drake (

Subjects: Optical, Request for Observations, Nova, Supernova, Transients

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

CSS080608:125851+242257 2008-06-08 UT 06:33:14 RA 12:58:50.55 Dec 24:22:57.4 Mag 18.5 Type SN

For finding charts and discovery images please see:

The object is near the edge of galaxy MAPS-NGP O_379_0244547 (z=0.043, g ~ 17.86, r ~ 17.48, i ~ 17.21 (SDSS)). The transient is consistent with a Supernova. The CSS discovery observations consist of four images spanning ~ 30 minutes. No transients are present in earlier epochs of CSS imaging including data taken on the 29th April UT (to mag ~21), or prior DSS, PQ and SDSS images to mag ~23. Follow-up would be appreciated.

Additional candidate and confirmed CSS SNe can be found here.

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