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PESSTO spectroscopic classification of optical transients

ATel #8306; S. Mattila (Turku), J. Harmanen (Turku, NOT), M. Dennefeld (IAP, UPMC), T. Kangas (Turku), T-.W. Chen (MPE), R. Cartier (Southampton), C. Inserra (QUB), M. Fraser (IoA), A. Gal-Yam (Weizmann), E. Kankare, K. Maguire, S. J. Smartt, K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (LCOGT), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), C. Baltay, N. Ellman, E. Hadjiyska, R. McKinnon, D. Rabinowitz, S. Rostami (Yale University), U. Feindt, M. Kowalski (Universitat Bonn), P. Nugent (LBL Berkeley), 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 19 Nov 2015; 17:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Tuomas Kangas (tjakan@utu.fi)

Subjects: Optical, Supernovae

Referred to by ATel #: 8320

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 La Silla Quest (LSQ; Baltay et al. 2013, PASP, 125, 683), 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/ ) and the TOCP webpage. All observations were performed on the ESO New Technology Telescope at La Silla on 2015 Nov. 18, 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
LSQ15bor | 02 43 16.08 | -18 10 52.5 | 20151109 | LSQ | 18.45 | 0.055 | II | +10 | (1) LSQ15bpd | 05 02 46.69 | -18 32 11.1 | 20151116 | LSQ | 19.07 | 0.081 | Ia | +10 | PSNJ22305942-1359561 | 22 30 59.41 | -13 59 56.1 | 20151110 | TOCP | 17.70 | 0.016 | IIb | +7 | (2) OGLE15rd | 00 29 34.51 | -67 59 52.2 | 20151114 | OGLE | 19.79 | - | - | - | (3) PS15cwi | 09 21 31.27 | +05 10 26.7 | 20151013 | PSST | 20.43 | 0.058 | II | +30 | (4) PS15cwz | 23 52 09.61 | -29 04 44.6 | 20151117 | PSST | 17.90 | 0.039 | Ia | ~max | (5)

(1) Blue continuum with broad Balmer lines; narrow H alpha from the host galaxy. At least 10 days after maximum based on the light curve.
(2) A decent fit to type IIb several days after maximum, but reasonable fits to SNe Ib as well.
(3) Very noisy spectrum; blue (featureless?) continuum. Rising light curve.
(4) A good fit to a normal SN II-P at ~a month after maximum. Narrow host galaxy Balmer lines.
(5) Best fit to a 1991bg-like SN Ia around maximum.

NB: There was a typo in the redshift of OGLE15qz (z=0.063) in the table of ATel #8296. The correct redshift, as reported in note (2), is z=0.63.