Keck spectroscopic classification of CRTS SNe
ATel #4669; A. J. Drake, S. G. Djorgovski, A. A. Mahabal, M. J. Graham, R. Williams (Caltech); J. Prieto (Princeton); M. Catelan (PUC Chile); E. Christensen, S. M. Larson (LPL/UA)
on 22 Dec 2012; 18:35 UT
Credential Certification: Andrew J. Drake (ajd@cacr.caltech.edu)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 4730
Further to ATel#4595, here we report the classification of CRTS supernovae
observed with the Keck-I+LRIS on Dec 16th and 17th UT. Spectra were cross-correlated
using SNIDs software (Blondin and Tonry 2007, ApJ, 666, 1024) and the following results
were found:
| CRTS ID | Type | Match/age | z | Notes |
|---|
| CSS121213:021824+163359 | IIP | 2006bp +7 | 0.03 | |
| CSS121212:021426+052309 | Ia | 2004eo +2 | 0.08 | |
| CSS121212:025025+070218 | Ia | 2002er +6 | 0.12 | |
| CSS121210:112615+144039 | Ic | 1997ef -5 | 0.090 | a |
| CSS121204:033907-064917 | Ib | 1999dn +7 | 0.03 | |
| CSS121122:025711+112343 | Ia | 1990N +18 | 0.07 | |
| CSS121112:002624+163027 | Ia | 1999ee +41 | 0.05 | b |
Notes:
a, CSS121210:112615+144039 exhibits strong narrow lines of [OIII] and [OII] as well
as Balmer lines, suggesting significant star formation in the dwarf galaxy host.
b, ATEL#4595.
All transients were discovered in real-time by the CRTS pipeline and openly
published to VOEvent network subscribers (such as http://Skyalert.org ) and
on CRTS web pages.
Links to CRTS transient can be found at http://crts.caltech.edu/.
