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Twelve CRTS Optical Transients

ATEL # 1734; A.J. Drake, A. Mahabal, S.G. Djorgovski, R. Williams, M.J. Graham (Caltech); E.C. Beshore, S.M. Larson, R. Hill (LPL/UA); M. Catelan (PUC), E. Christensen (Gemini Observatory);
on 24 Sep 2008; 4:48 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Andrew J. Drake (ajd@cacr.caltech.edu)

Subjects: Optical, Cataclysmic Variables, Nova, Supernova, Transients

The Catalina Real-time Transient Survey (CRTS) has detected 12 optical transients in Catalina Sky Survey images taken between the 20th and 23rd of Sep 2008 UT. The objects have the following parameters:

IDDetection DateRADecMagTypeNotes
CSS080923:021134+235249 2008-09-23 UT 08:19:24 02:11:33.98 23:52:49.6 17.7 SN Appears associated with galaxy 2MASX J02113233+2353074.
CSS080923:012133+294114 2008-09-23 UT 05:58:24 01:21:32.80 29:41:14.3 18.8 SN? Possible host galaxy seen in CSS images.
CSS080923:005911+270036 2008-09-23 UT 05:55:54 00:59:10.69 27:00:36.8 18.8 SN?Resides in the NGC 326 galaxy group (z=0.047).
CSS080923:230115+224111 2008-09-23 UT 04:11:58 23:01:15.40 22:41:11.3 16.9 CV/Var Past outbursts. Source appears red not blue.
CSS080923:011149+143826 2008-09-23 UT 06:45:00 01:11:49.23 14:38:26.3 16.7 SN Associated with galaxy SDSS J011149.19+143826.5 (photz=0.042)
CSS080922:011307+215250 2008-09-22 UT 11:46:05 01:13:06.75 21:52:50.4 15.3 CV Confirmed new SU UMa by H. Maehara, (vsnet-alert 10539)
CSS080922:231617+114247 2008-09-22 UT 08:41:54 23:16:16.60 11:42:47.5 17.1 CV/SN? P60 obs. (g=16.6, r=17.3, i=17.4) Sep. 23.13 UT.
CSS080922:020008-112029 2008-09-22 UT 11:02:56 02:00:08.10 -11:20:29.3 19.0 SN? Source appears in PQ. P60 r=19.0 Sep. 23.26 UT.
CSS080921:010522+110252 2008-09-21 UT 09:46:34 01:05:22.22 11:02:52.9 16.4 CV Fading. Past outbursts. P60 (g=17.3, r=17.8, i=18.1) Sep. 22.17 UT.
CSS080921:012706+031305 2008-09-21 UT 09:52:44 01:27:05.78 03:13:05.7 17.5 CV Blue object PQ images. P60 (g=17.5, r=17.9, i=18.1) Sep. 22.21 UT.
CSS080921:204110-043803 2008-09-21 UT 05:24:32 20:41:10.12 -04:38:02.6 17.5 SN? Getting brighter. No SDSS source. P60 r=18.3 Sep. 23.23 UT.
CSS080920:005959-090032 2008-09-20 UT 11:05:28 00:59:58.88 -09:00:32.2 18.3 SN Getting brighter. SNF20080918-004

CSS080920:005959-090032 is a spectroscopically confirmed SN-Ia at z=0.05 first discovered by the SNfactory (SNF20080918-004). This object has no observable host galaxy in SDSS data to r > 22.5 and was measured at r = 18.16 using the P60 on Sep. 23.21 UT. At the SN's redshift the host galaxy must by fainter than M ~ -14.1 to not appear in SDSS images.

We request photometric and spectroscopic follow-up.

For finding charts and discovery images please see: http://voeventnet.cacr.caltech.edu/feeds/ATEL/CRTS.
CRTS optical transients are detected and published as VOEvents in real-time at http://voeventnet.org/feeds/Catalina.shtml


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