PESSTO spectroscopic classification of optical transients
ATel #6087; S. Benitez (MPA), J. Polshaw, M. Nicholl, S. J. Smartt (QUB), M. Fraser (IoA), N. Elias-Rosa (INAF - Padova/ICE-IEEC/CSIC Barcelona), J. Anderson (ESO Chile), S. Benetti, A. Pastorello (INAF - Padova), C. Inserra, K. Smith, D. Young (QUB), M. Sullivan (Southampton), S. Taubenberger (MPA), S. Valenti (LCOGT), O. Yaron, A. Gal-Yam, (Weizmann), C. Knapic, R. Smareglia, M. Molinaro (Trieste), I. Manulis (Weizmann), 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 21 Apr 2014; 18:28 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stephen Smartt (firstname.lastname@example.org)
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 Baltay et al. 2013, PASP, 125, 683) and the IAU Transient Objects Confirmation Page list. All observations were performed on the ESO New Technology Telescope at La Silla on 2014 Apr 20, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). 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
LSQ14asn | 12:56:25.16 | -30:23:49.9 | 20140318 | LSQ | 20.5 | 0.05 | II | around max, +30d post-explosion (1)
LSQ14aym | 12:58:45.70 | -14:36:44.4 | 20140324 | LSQ | 21.0 | 0.05 | Ia | max
LSQ14azm | 14:26:52.01 | -23:06:44.0 | 20140326 | LSQ | 19.8 | 0.12 | Ia | +7d
LSQ14azr | 13:34:16.02 | -01:37:22.5 | 20140329 | LSQ | 20.7 | 0.08 | Ia | max (2)
LSQ14baz | 12:39:18.80 | -16:12:28.9 | 20140328 | LSQ | 21.1 | 0.07 | Ia | max
LSQ14bcj | 14:05:58.39 | -12:04:10.4 | 20140403 | LSQ | 19.2 | 0.02 | Ia | -7d
PSN J21461482-4631211 | 21:46:14.82 | -46:31:21.1 | 20140420 | TOCP | 16.3 | 0.03 | Ia | -7d
(1) SNID finds best match to SN 2005cs (Type IIP) 2-5 days after peak, at z=0.054 (absolute mag M =-17.2). However, LSQ photometry shows a long rise-time of 25 to 35 days. Probably a SN1987A-like object, with narrow line spectra like SN2009E (Pastorello et al. 2012 A&A, 537, 141) The host appears to be very faint.
(2) SNID finds good matches to both normal and 91T-like SNe Ia at around maximum.