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PESSTO spectroscopic classification of optical transients

ATel #4703; G. Leloudas (OKC/Stockholm, DARK/NBI), J. Sollerman, F. Taddia, M. Ergon (OKC/Stockholm), M. T. Botticella (INAF - Capodimonte Astronomical Observatory), A. De Cia (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), S. Benetti, A. Pastorello, (INAF - Padova Astronomical Observatory), S. Valenti (LCOGT/UCSB), S. Taubenberger (MPA Garching), 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 Jan 2013; 16:14 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giorgos Leloudas (giorgos@dark-cosmology.dk)

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 amateur astronomers (http://www.cbat.eps.harvard.edu/unconf/tocp.html). All observations were performed on the ESO New Technology Telescope at La Silla on 2013 January 4, 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
PSN J09040080-7203248| 09 04 00.80 |-72 03 24.8 | 20130103 | TOCP | 17.2 | 0.038 | Ia | around max | LSQ12hud | 09 37 13 33 |-02 12 12.8 | 20121125 | LSQ | 21.0 | 0.088 | - | - | (*) LSQ13l | 10 22 46.69 |-07 29 10.5 | 20130103 | LSQ | 19.1 | 0.105 | Ia-91T | before max | (**) LSQ13i | 11 53 21.79 |-16 09 25.8 | 20121224 | LSQ | 18.7 | 0.096 | IIn | - | (***) LSQ13d | 12 21 11.90 |-17 55 57.3 | 20130103 | LSQ | 18.0 | 0.026 | IIP | about 1 week after explosion |

(*) The extracted spectrum is that of a S0 galaxy (**) This SN is likely associated with a faint (m > 20.5) galaxy ~5 arcsec away. The redshift of this galaxy, as measured by OIII emission, is z=0.105, which places the SN at a projected distance of ~9 kpc. The SN spectrum shows weak Si and it is well matched by 91T-like events before maximum light. (***) Narrow H-alpha component sitting on top of a broad and asymmetric base. Good match to SNe 2007bw and 2007bt.