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PESSTO spectroscopic classification of optical transients

ATel #4313; D. Wright (Queens University Belfast), F. Cellier-Holzem (LPHNE, Paris), C. Inserra, S. J. Smartt, M. Fraser, D. R. Young, K. W. Smith (Queens University Belfast), A. Pastorello, S. Valenti, S. Benetti (INAF-Osservatorio Astronomico di Padova), S. Taubenberger (MPA), M. Sullivan (University of Oxford), A. Gal-Yam, O. Yaron, I. Arcavi (Weizmann Institute for Science)
on 18 Aug 2012; 15:00 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (mfraser02@qub.ac.uk)

Subjects: Optical, Supernovae

Referred to by ATel #: 4329, 4498

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 Catalina Real-time Transient Survey (http://crts.caltech.edu/) and via the IAU Transient Objects Confirmation Page. All observations were performed on the ESO New Technology Telescope at La Silla on 2012 August 17, 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          | Dec         | Disc. Date | Disc. source | Disc. Mag | Redshift | Type      | Phase       | Notes   
PSN J19371572-4218271    | 19:37:15.72 | -42:18:27.1 | 20120812   | TOCP         | 17.2      | 0.02     | SN IIP    | +10-12      | Normal, matches to 99em, 04et, 06bp   
SSS120810:231802-560926  | 23:18:01.82 | -56:09:25.7 | 20120810   | CRTS         | 18.0      | ?        | ?         | ?           | See Note 1 
SSS120807:233315-330852  | 23:33:14.84 | -33:08:52.0 | 20120807   | CRTS         | 18.5      | 0.03     | SN IIP    | +10         | Best match is to 92H  

(1) SSS120810:231802-560926 has a blue, and largely featureless continuum. The strongest feature in the spectrum appears to be at 4500A, with a FWHM of ~100A. We are unable to determine a redshift for this transient, and SNID is unable to find a matching template.