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PESSTO spectroscopic classification of optical transients

ATel #8268; M. Dennefeld (IAP, UPMC), J. Harmanen (Turku, NOT), T. Kangas, S. Mattila (Turku), L. Galbany (MAS, DAS), K. Maguire, C. Inserra, E. Kankare (QUB), I. Manulis (Weizmann), S. J. Smartt, K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young, 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 10 Nov 2015; 15:30 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Tuomas Kangas (tjakan@utu.fi)

Subjects: Optical, Supernovae

PESSTO, the Public ESO Spectroscopic Survey for Transient Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by Pan-STARRS Survey for Transients (see Huber et al., ATel #7153), OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), All Sky Automated Survey for SuperNovae ASAS-SN (see Shappee et al. 2014, ApJ, 788, 48 and http://www.astronomy.ohio-state.edu/~assassin/index.shtml ) and CRTS (Drake et al. 2009, 696, 870 ; http://crts.caltech.edu/ ) (see below). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 Nov. 9, using EFOSC2 and Grism 13, with a 1.5 arcsec slit due to poor seeing (3985-9315A, 27A 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 
  
 ASASSN-15sh             | 19 32 06.94 | -62 26 31.5 |  20151102  |    ASAS-SN   |   16.60   | 0.033 |  Ia   | +14d  | (1) 
 CSS151109-032647-163538 | 03 26 47.31 | -16 35 37.9 |  20151109  |     CRTS     |   19.50   | 0.134 |  Ia   | ~0d   | (2) 
 CSS151109-101502+074830 | 10 15 02.42 | +07 48 30.1 |  20151109  |     CRTS     |   16.30   | 0.027 |  Ia   | -5d   | (2) 
 OGLE15ng                | 00 22 19.88 | -75 12 26.3 |  20151017  |     OGLE     |   19.51   | 0.079 |  Ia   | +10d  | (2) 
 OGLE15oa                | 04 36 25.63 | -62 47 51.7 |  20151016  |     OGLE     |   21.26   | 0.059 |  Ia   | +20d  | (2) 
 OGLE15pf                | 05 17 12.37 | -71 52 39.6 |  20151030  |     OGLE     |   18.48   | 0.018 |  II   | +9d   | (3) 
 PS15cox                 | 03 08 04.79 | -03 14 54.2 |  20151025  |     PSST     |   17.31   | 0.031 |  Ia   | +14d  | (2) 
 PS15ctg                 | 04 13 58.45 | +02 08 43.0 |  20151102  |     PSST     |   19.92   | 0.078 |  Ia   | ~0d   | (2) 
 PS15ctw                 | 22 52 05.94 | -05 50 50.0 |  20151102  |     PSST     |   19.15   | 0.089 |  Ia   | ~0d   | (4) 

(1) Best matches to 1991T-like SNe around two weeks after maximum.
(2) Best match to a normal type Ia SN at the indicated phase.
(3) Weak P Cygni absorption in H alpha; best match to SN 1980K (II-L) 9 days after maximum.
(4) Best matches to 1991T-like SNe around maximum. Normal type Ia SNe also provide reasonable matches.