CRTS Candidate Supernovae

ATel #2029; A. J. Drake, S. G. Djorgovski, A. A. Mahabal, M. J. Graham, R. Williams (Caltech); M. Catelan (PUC); E. C. Beshore, S. M. Larson, A. Boattini, A. Gibbs, R. Hill, R. Kowalski (LPL/UA); E. Christensen (Gemini Observatory);
on 24 Apr 2009; 07:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)

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We report on the discovery of ten probable SNe made by CRTS with CSS images taken between UT dates Mar 27th and Apr 24th. The objects have the following parameters:

ID	Detection Date	RA	Dec	Mag	Type
CSS090424:092341+502411	2009-04-24 UT 05:08:11	09:23:41.42	50:24:11.2	17.9	SN?
CSS090422:150104+431313	2009-04-22 UT 09:16:08	15:01:04.03	43:13:13.9	18.4	SN?
CSS090421:133609+340319	2009-04-21 UT 06:38:38	13:36:09.45	34:03:19.0	19.2	SN
CSS090419:110629+240515	2009-04-19 UT 05:26:33	11:06:28.89	24:05:15.4	18.3	SN
CSS090418:081414+242340	2009-04-18 UT 03:27:11	08:14:13.59	24:23:40.2	19.3	SN
CSS090417:095440+191112	2009-04-17 UT 04:58:12	09:54:40.35	19:11:12.7	17.7	SN
CSS090403:144702+095737	2009-04-03 UT 08:46:07	14:47:02.39	09:57:37.4	18.1	SN
CSS090403:123536+015212	2009-04-03 UT 06:16:24	12:35:35.77	01:52:12.6	18.1	SN
CSS090403:120901-052908	2009-04-03 UT 07:05:30	12:09:00.99	-05:29:07.9	18.9	SN
CSS090327:122727+085701	2009-03-27 UT 07:56:16	12:27:27.20	08:57:01.9	18.6	SN

All candidates have been detected in CSS or P60 images on multiple nights with the exception of CSS090422:150104+431313 and CSS090424:092341+502411. Further to ATEL#2010, additional SMARTS observations confirm the type-IIn classification with a spectrum similar to the slowly evolving SN 2007rt near 500 days (Trundle et al.arXiv:0904.0119). Archival CSS data dating back to Apr. 2005 show that the explosion occurred between Jun. 18 2007 and Oct. 13 2007 UT.

We request photometric and spectroscopic follow-up.

For finding charts, discovery images, lightcurves, etc., please see: http://voeventnet.cacr.caltech.edu/feeds/ATEL/CRTS.
Current candidate and confirmed SNe can be found here.