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PESSTO spectroscopic classification of optical transients

ATel #4955; A. Morales-Garoffolo (ICE-IEEC/CSIC Barcelona), S. Hachinger (Univ. Wuerzburg), S. Taubenberger (MPA Garching), N. Elias-Rosa (ICE-IEEC/CSIC Barcelona), M. Fraser (Queen's University Belfast), E. S. Walker, C. Baltay, N. Ellman, E. Hadjiyska, R. McKinnon, D. Rabinowitz (Yale University), U. Feindt, M. Kowalski (Universitat Bonn), P. Nugent (LBL Berkeley), S. Benetti, A. Pastorello, (INAF - Padova Astronomical Observatory), S. Valenti (LCOGT/UCSB), S. J. Smartt, K. Smith, D. Young (Queen's University Belfast), M. Sullivan (University of Southampton), A. Gal-Yam, O. Yaron (Weizmann Institute for Science).
on 5 Apr 2013; 17:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: N. Elias-Rosa (nelias@ice.cat)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Valenti et al., ATel #4037; http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by the La Silla-Quest survey (see Hadjiyska et al., ATel #3812) and the Catalina Real-time Transient Survey (http://crts.caltech.edu/). All observations were performed on the ESO New Technology Telescope at La Silla on 2013 April 04, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). Classification spectra can be obtained from http://www.pessto.org (via WISeREP).

 
 Name                    | RA (J2000)  | Dec (J2000) | Disc. Date | Disc. Source | Disc Mag |   z   |  Type    |  Phase       | Notes
LSQ13sd | 10 21 35.56 | +20 56 19.7 | 20130330 | LSQ | 18.7 | 0.039 | IIn? | - | (1) LSQ13th | 09 28 48.97 | -03 30 46.4 | 20130402 | LSQ | 19.2 | 0.056 | Ib/c | a week | (2) CSS130403:150213+103846 | 15 02 13.09 | +10 38 45.6 | 20130403 | CRTS | 18.5 | 0.070 | Ia-pec | around max | (3)

(1) Good match with several type IIn SNe. We do not discard the possibility that this object could be a SN impostor given the fact that the narrow Halpha is not resolved and there is no unequivocal evidence of broader line wings.

(2) Good match with several type Ib SNe around a week after maximum light.

(3) Good match with the peculiar Ia SN 2000cx around maximum light.