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Supernova Candidates and Confirmations from CRTS

ATel #2852; A. J. Drake, S. G. Djorgovski, A. A. Mahabal, M. J. Graham, R. Williams (Caltech); A. Myers (UIUC); J. Prieto (OCIW); M. Catelan (PUC); E. Christensen (Gemini Observatory); E. C. Beshore, S. M. Larson (LPL/UA); R. H. McNaught (ANU).
on 21 Sep 2010; 19:50 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)

Subjects: Optical, Supernovae, Transient

We report the discovery and confirmation of supernovae by the Catalina Real-time Transient Survey (CRTS) in data from the Catalina Sky Survey during the period from 2010-09-01 to 2010-09-18 UT.

SNe confirmed with Palomar 5m between Sep 12th and 14th:
IDDisc. DateRADecDisc. Mag Type Redshift
CSS100912:223118+010516 2010-09-12 22:31:18.33 01:05:16.0 18.2 Ia0.036
CSS100910:001539+271250 2010-09-10 00:15:39.14 27:12:50.0 18.1 IIn0.024
MLS100904:225125-015605 2010-09-04 22:51:25.38 -01:56:05.4 19.3 Ia0.097
SN candidates:
IDDisc. DateRADecDisc. Mag
MLS100918:022749+162612 2010-09-18 02:27:48.72 16:26:12.4 20.7
MLS100918:001802+144556 2010-09-18 00:18:01.77 14:45:55.8 19.8
CSS100916:003551-160324 2010-09-16 00:35:51.43 -16:03:23.6 16.3
MLS100915:214900-103239 2010-09-15 21:48:59.86 -10:32:39.2 18.9
MLS100911:033634+193727 2010-09-11 03:36:33.87 19:37:26.7 20.2
MLS100905:035122+181501 2010-09-05 03:51:22.38 18:15:01.3 20.8
MLS100902:004233+042524 2010-09-02 00:42:32.87 04:25:23.6 19.6
MLS100901:224523-070002 2010-09-01 22:45:22.52 -07:00:02.2 19.9

Additional notes.  
SN 2010hs (Cenko et al. 2010, CBET#2454) was discovered in public CSS data taken on Sept 10.35 UT  
by S. Howerton. A confirming spectrogram was taken Sept 12.29 (4 hours before detection by Cenko   
et al. 2010). The spectrum best matches type Ia 1996X two days before maximum at redshift z=0.076.  
SN 2010ht (Drake et al. 2010, CBET#2455) is a type IIP (Prieto et al. 2010, CBET#2455) SN at z=0.024.   
We obtained a Palomar spectrum that confirms this result. The host galaxy appears to have mag V~22   
in archival CFHT megaprime images. This suggests that the host galaxy is extremely faint (Mv~-13).  
CSS100910:001539+271250 exhibits strong narrow Balmer lines with slight P Cygni profiles and matches   
the redshift of bright galaxy 2MASX_J00153655+2714265. The large projected distance from 2MASX_J00153655+2714265 (50kpc)   
and the type IIn nature of the event suggests that the SN may be associated with an unseen dwarf galaxy.  
A possible low S/N source is seen in blue DSS2 images.  
More information and finding charts can be found at http://voeventnet.caltech.edu/feeds/ATEL/CRTS/
All CRTS SN discoveries are available from http://crts.caltech.edu/.

Follow-up is requested.