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PESSTO spectroscopic classification of optical transients

ATel #9337; T. Reynolds (Turku), M. Fraser (IoA, Cambridge), S. Mattila (Turku) J. Anderson (ESO), J. Chen (MPE), S. Taubenberger (ESO), L. Galbany (Univ. de Chile), C. Inserra (QUB), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), K. W. Smith (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann) J. Tonry, B. Stalder, L. Denneau., A. Heinze, A. Sherstyuk (IfA, Univ. of Hawaii), A. Rest (STScI), D. Wright (Oxford), K. Chambers, H. Flewelling, M. Huber, E. Magnier, J. Tonry, C. Waters, R. J. Wainscoat (IfA, Univ. Hawaii), R. Scalzo, F. Yuan, M. Childress, B. Tucker, B. Schmidt (Australian National University)
on 7 Aug 2016; 21:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stephen Smartt (s.smartt@qub.ac.uk)

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 the SkyMapper survey (see Scalzo et al. ATel #5480), Pan-STARRS Survey for Transients (see Huber et al., ATel #7153), 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 the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680). All observations were performed on the ESO New Technology Telescope at La Silla on 2016 08 06, 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 and additional details can be obtained from http://www.pessto.org (via WISeREP) and the IAU Transient Name Server. Redshifts reported to more than 2 significant figures are from host galaxy emission lines, otherwise are estimated from the transient object features.

 
Survey Name | IAU Name  | RA (J2000) | Dec (J2000) | Disc. Date | Source      | Disc Mag |  z    | Type   | Phase      | Notes 
ASASSN-16ic | SN2016eqw | 01:14:15.5 | -16:24:57.6 |  20160806  | ASAS-SN     |  16.80   | 0.05  |  Ia    | +10d       | (1) 
PS16dpm     | --------- | 14:23:20.1 | -00:32:16.4 |  20160731  | PSST        |  19.82   | 0.13  |  Ia    | -7 to –4d  | (2) 
ATLAS16bzd  | AT2016epb | 02:26:04.5 | -07:55:40.2 |  20160802  | ATLAS       |  18.68   | -     |  Star  | -          |  - 
ATLAS16byy  | AT2016epc | 15:37:42.4 | -22:36:16.3 |  20160801  | ATLAS       |  16.98   | 0     |  Star  | -          | (3) 
ATLAS16bws  | SN2016eno | 23:25:17.7 | -18:52:42.2 |  20160801  | ATLAS       |  18.48   | 0.08  |  Ia    | +8 to 10d  | (4) 
ATLAS16bwb  | SN2016enp | 23:34:25.3 | -06:34:42.2 |  20160801  | ATLAS       |  17.93   | 0.03  |  II    | young      | (5) 
SMT16ojf    | --------- | 14:21:13.1 | +00:25:41.3 |  20160703  | SkyMapper   |  19.55   | 0.085 |  Ia    | +10-20d    | (6) 
ATLAS16bzh  | SN2016epd | 02:52:09.3 | -08:40:24.4 |  20160801  | ATLAS       |  18.10   | 0.0572|  Ia    | +8 to +10d | (7) 
ATLAS16bwu  | SN2016enx | 01:14:22.3 | -13:09:11.1 |  20160801  | ATLAS       |  18.29   | 0.08  |  Ia    | -3 to +3d  | (8) 
ATLAS16bzb  | SN2016epa | 02:26:10.8 | -23:23:54.1 |  20160801  | ATLAS       |  17.98   | 0.06  |  Ia    | +4 to +7d  | (9) 

(1) Best fit with 91T-like templates 7 to 10d after peak
(2) Best fit with normal type Ia SN pre-peak. 1.3 degrees from IceCube-160731 neutrino position.
(3) Hostless transient to r~22. Blue continuum, weak absorption at restframe H-gamma, H-beta, stellar outburst
(4) Faint host in SDSS, r=21.4. Normal Ia
(5) Steep blue continuum, weak and broad H-alpha at z=0.03. Likely young type II, but >6d from explosion, ATLAS shows flat lightcurve. See also ATel #9335
(6) H-alpha emission, but likely host galaxy contamination. 1.07 degrees from IceCube-160731 neutrino position.
(7) Fits with multiple normal type Ia SNe eg. SN1992A 8-10 days after max light
(8) Good fit with 1991T-like at z=0.07+/0.01, or normal Ia at z=0.08-0.09. Flat lightcurve at M_g ~ -19.2
(9) Good fits with normal Ia spectra after peak

PESSTO