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PESSTO spectroscopic classification of optical transients

ATel #8399; L. Le Guillou, R. Le Breton (LPNHE), T.-W. Chen (MPE), C. Inserra, E. Kankare, K. Maguire (QUB), I. Manulis (Weizmann), S. J. Smartt, K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), L. Wyrzykowski (Warsaw Observatory, Poland), D. Young, D. Wright (QUB), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii)
on 11 Dec 2015; 17:10 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kate Maguire (kate.maguire@qub.ac.uk)

Subjects: Optical, Supernovae

Referred to by ATel #: 8403

PESSTO, the Public ESO Spectroscopic Survey for Transient The Objects (see Smartt et al. 2015, A&A, 579, 40 http://www.pessto.org ), reports the following supernova classifications. Targets were supplied by the 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 ), OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), and Pan-STARRS Survey for Transients (see Huber et al., ATel #7153). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 December 10, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024), GELATO (Harutyunyan et al., 2008, A&A, 488, 383) and superfit (Howell et al, 2005, ApJ, 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-15tt | 06:38:01.49 | -37:39:30.9 | 2015 12 06 | ASAS-SN | 17.0 | 0.034 | Ia | +7 | (1) OGLE15xc | 04:54:14.71 | -63:55:30.3 | 2015 11 14 | OGLE | 21.53 | 0.083 | II | early | (2) PS15ddr | 05:46:38.36 | -13:14:10.6 | 2015 12 03 | PSST | 20.33 | - | - | - | (3)

(1) Best spectral match to SN Ia, SN 2009N at +7 w.r.t. max.
(2) Best spectral match to Type IIP SN, SN 2006bp at +7 days since explosion.
(3) Low S/N spectrum, showing a flat, reasonably featureless continuum with a bump at ~4800 A (observer frame).