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PESSTO spectroscopic classification of optical transients

ATel #7308; N. Walton, H. Campbell (IoA), C. Frohmaier, S. Prajs, R. Cartier (Southampton), Morgan Fraser (IoA), Lluis Galbany (MAS, DAS), C. Inserra (QUB), K. Maguire (ESO), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young (QUB), D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii), L. Wyrzykowski,(Warsaw Observatory, Poland)
on 29 Mar 2015; 01:17 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Mathew Smith (matsmith2@gmail.com)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al., arXiv:1411.0299 http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by Pan-STARRS Survey for Transients (see Huber et al., ATel #7153), the All Sky Automated Survey for SuperNovae (ASAS-SN, http://www.astronomy.ohio-state.edu/~assassin/index.shtml ) and the OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 March 27, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and Superfit (Howell et al. 2005, Ap.J. 634, 1190). 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 
 ASASSN-15fr      | 09 20 20.44 | -07 38 26.7 |  20150324  |    ASASSN    |   16.4   | 0.033 |  Ia      |  at max | a      
 OGLE-2014-SN-173 | 06 28 40.63 | -69 40 48.1 |  20141116  |    OGLE      |   17.2   | 0.029 |  unknown |         | b     
 PS15si           | 11 10 22.93 | -04 21 31.5 |  20150323  |    PS1       |   16.9   | 0.053 |  IIn     | > +20 d | c     
 PS15sv           | 16 13 11.74 | +01 35 31.1 |  20150323  |    PS1       |   17.5   | 0.033 |  Ia-91T  |    -6 d |       
 PS15rs           | 16 14 01.35 | -18 03 32.8 |  20150321  |    PS1       |   17.3   | 0.029 |  Ia      |   +10 d | d     
 

(a) Previously classified in ATEL #7305
(b) Object found close to the location of a previously discovered transient. Strong galaxy contamination. Possible Superfit match to a 2009ip-like outburst.
(c) Good match to type IIn at +50-60 days post maximum but there are other matches at +14 days.
(d) Hostless galaxy redshift could not be determined. Redshift obtained using SNID.