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PESSTO spectroscopic classification of optical transients

ATel #5839; G. Leloudas (Stockholm/DARK), M. Ergon, F. Taddia, A. Nyholm, J. Sollerman (Stockholm), C. Inserra (QUB), R. Scalzo (Australian National University), S. Benetti, A. Pastorello (Padova), S. Smartt, K. Smith, D. Young (QUB), M. Sullivan (Southampton), S. Taubenberger (MPA), S. Valenti (LCOGT), M. Fraser (IoA), O. Yaron, A. Gal-Yam, I. Manulis (Weizmann), C. Knapic, R. Smareglia, M. Molinaro (Trieste), 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 31 Jan 2014; 16:32 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Francesco Taddia (ftadd@astro.su.se)

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 2014 January 31 UT, 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  
                                                                      
CSS140128-082352+043655  | 08:23:52.31   | +04:36:55.0  | 20140128   | CRTS         |    18.5    | 0.06  | Ia     | pre-max |    
LSQ14mo                  | 10:22:41.53   | -16:55:14.4  | 20140130   | LSQ          |    19.1    | 0.253 | SLSN-I | pre-max |   (1) 
 

(1) The LSQ14mo light curve shows a steady rise for 20 days. The spectrum demonstrates an excellent match with the pre-max spectrum of PTF09cnd (Quimby et al. 2011) at an approximate redshift of 0.25. A follow-up spectrum of LSQ14mo with a bluer grism (resolution 13A) shows an absorption line at 3510A, which, if interpreted as Mg II 2800A, sets the redshift to 0.253. The current absolute magnitude of this object, given this redshift, is about -21.6.