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PESSTO spectroscopic classification of optical transients

ATel #8296; T. Kangas (Turku), M. Dennefeld (IAP, UPMC), J. Harmanen (Turku, NOT), S. Mattila (Turku), R. Cartier (Southampton), T-.W. Chen (MPE), C. Inserra (QUB), M. Fraser (IoA), 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 18 Nov 2015; 18:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Seppo Mattila (seppo.mattila@utu.fi)

Subjects: Optical, Supernovae

Referred to by ATel #: 8301, 8306, 8314, 8485

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), and OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ) (see below). All observations were performed on the ESO New Technology Telescope at La Silla on 2015 Nov. 17, 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
LSQ15bon | 00 48 08.67 | -29 08 22.9 | 20151113 | LSQ | 19.05 | 0.06 | Ia | ~max | (1) OGLE15qk | 03 30 00.33 | -71 30 08.6 | 20150815 | OGLE | 20.91 | 0.065 | Ia | ~max | (1) OGLE15qz | 03 08 35.88 | -70 30 41.6 | 20150904 | OGLE | 21.36 | 0.063 |SLSN Ic| ~max | (2) OGLE15rb | 05 12 52.03 | -61 52 00.3 | 20151025 | OGLE | 20.90 | 0.028 | Ic | ~max | (3) PS15cmq | 09 48 22.98 | -03 27 41.2 | 20151015 | PSST | 20.30 | 0.065 | II | +11d | (4) PS15cvn | 00 09 21.67 | -00 04 06.5 | 20151107 | PSST | 18.61 | 0.065 | Ic | ~max | (5) PS15cwj | 09 27 44.88 | -08 31 32.1 | 20151013 | PSST | 20.12 | 0.135 | Ia | +20d | PS15cwo | 03 11 16.73 | +01 11 34.5 | 20151115 | PSST | 17.75 | 0.02 | II | ~max | (6)

(1) Normal SN Ia around maximum light.
(2) Similar to several SLSNe Ic (e.g. PFT12dam) at z ~ 0.63 with absolute magnitude -22.6.
(3) Redshift from host galaxy lines.
(4) Noisy spectrum showing possible broad Halpha corresponding to z = 0.065.
(5) A blue spectrum. Matches found to several SNe Ic around maximum light.
(6) Very Blue, almost featureless continuum with broad Balmer lines. Similar to the early spectra of SN 1979c and 1998S.