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ePESSTO spectroscopic classification of optical transients

ATel #10659; D. Homan (Univ. of Edinburgh) J. Lyman (Univ. of Warwick), G. Leloudas (DARK), M. Fraser (UCD), K. Maguire, E. Kankare, S. J. Smartt, K. W. Smith, D. Young (QUB), C. Inserra, M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron, I. Manulis (Weizmann), D. Wright (Minnesota), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe. E. Magnier, A. Schultz, C. Waters, R. J. Wainscoat, M. Wilman, J. Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI), A. Moller, B. Tucker, B. Zhang, B. Schmidt (Australian National University), P. M. Garnavich (Notre Dame), S. Margheim (Gemini Observatory), D. Kasen (UCB/LBL), R. Olling, E. Shaya (U Maryland)
on 21 Aug 2017; 18:54 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giorgos Leloudas (giorgos@dark-cosmology.dk)

Subjects: Optical, Supernovae

ePESSTO, the extended 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 Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ), the Skymapper Survey (see Scalzo et al. ATel #5480), the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts), 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 2017-08-20, 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. Redshift is given with two digits when derived from SN template matching.

 
Survey Name | IAU Name  | RA (J2000) | Dec (J2000) | Disc. Date | Source | Disc Mag |  z    | Type  |  Phase    | Notes 
PS17egy     | SN2017gfg | 15 57 38.28| -22 57 07.6 |  20170818  |  PS1   |   19.6   | 0.10  | Ia    | -6        | (1),(2) 
SMT17rza    |  -        | 21 30 09.52| -51 02 17.9 |  20170813  |  SMT   |   19.3   | 0.07  | Ia    | max       |  
ATLAS17jof  | SN2017gfl | 21 55 18.45| -26 18 46.8 |  20170816  |  ATLAS |   18.7   | 0.077 | Ia    | -7        | (3) 
SMT17qtw    | SN2017fym | 22 00 49.41| -31 09 23.3 |  20170727  |  SMT   |   19.0   | 0.08  | Ia?   | +10 to +20| (4)  
SMT17sct    |  -        | 00 12 51.89| -32 43 53.0 |  20170816  |  SMT   |   19.5   | 0.06  | IIb   | pre-max   |  
ATLAS17jon  | SN2017gfm | 01 33 08.99| -06 33 45.2 |  20170815  |  ATLAS |   19.2   | 0.10  | Ia    | max       |  
ATLAS17joq  | SN2017gfn | 00 46 44.20| -18 49 21.8 |  20170815  |  ATLAS |   19.3   | 0.12  | Ia    | +4 to +7  |  
PS17ebg     | AT2017gfw | 02 08 01.28| -37 05 43.8 |  20170813  |  PS1   |   20.2   | 0.065 | galaxy| -         | (5)  
Gaia17car   | SN2017gbb | 05 53 04.81| -17 52 03.5 |  20170815  |  Gaia  |   16.4   | 0.010 | Iax   | +8        | (6)  
Gaia17cbg   | SN2017gbo | 06 24 33.40| -15 40 41.4 |  20170811  |  Gaia  |   17.9   | 0.04  | Ia    | + 3 weeks |   

(1) Best match with SN 2006gr at -6 days.
(2) Discovered as part of the Kepler Extra-Galactic Survey (KEGS) K2 Campaign 15. Located 2.97" from C15 galaxy 2MASX J15573838-2257105 (EPICID=204281574).
(3) Best match with SN 2005cf at -7 days.
(4) Most likely a SN Ia post-max. However, good matches are also found with SNe Ic.
(5) Only galaxy light.
(6) Best match with the Type Iax (02cx-like) SN 2010ae at +8 days. Near galaxy IC 438.