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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 (Supernova)
Password Certification: Andrew J. Drake (

Subjects: Optical, Nova, Supernova, Transients

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
All CRTS SN discoveries are available from

Follow-up is requested.

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R. E. Rutledge , Editor
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