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PESSTO spectroscopic classification of optical transients

ATel #4558; S. Marchi (U. de Chile), S. Gonzalez-Gaitan (U. de Chile), F. Bufano (UNAB), F. Forster (U. de Chile), J. Anderson (U. de Chile), S. Taubenberger (MPA Garching), S. Valenti (UCSB/LCOGT), A. Pastorello, S. Benetti (INAF - Padova Astronomical Observatory), 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), C. Baltay, N. Ellman, E. Hadjiyska, R. McKinnon, D. Rabinowitz, E. S. Walker (Yale University), U. Feindt, M. Kowalski (Universitat Bonn), P. Nugent (LBL Berkeley)
on 8 Nov 2012; 20:21 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Joseph Anderson (anderson@das.uchile.cl)

Subjects: Optical, Supernovae, Transient

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Valenti et al., ATel #4037; http://www.pessto.org ), reports the following transient classifications. Targets were supplied by the Chilean Automatic Supernova Search (http://www.das.uchile.cl/proyectoCHASE/) and the OGLE search (http://ogle.astrouw.edu.pl/ogle4/transients/transients.html). All observations were performed on the ESO New Technology Telescope at La Silla on 2012 November 7th, 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 
chase_ESO-9015 | 09 02 05.46 | -64:54:19.73| 20121106   |     CHASE      | 17.5 | 0.0056| II | a few months post explosion |  Best matches SN1999em at 2 months post explosion 
OGLE-2012-SN-027 | 01 35 11.24 | -73 35 36.7 |20121104 | OGLE | 19.8  | 0.07 | I |   | Noisy spectrum with host contamination. Reasonable fits to SN1991bg-like SNIa around max., and the SNIc 1983V around a week after max.