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ePESSTO spectroscopic classification of optical transients

ATel #10656; D. Homan (Univ. of Edinburgh), J. Lyman (Univ. of Warwick), M. T. Botticella (INAF-Capodimonte), M. Fraser (UCD), K. Maguire (QUB), 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)
on 19 Aug 2017; 18:08 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kate Maguire (kate.maguire@qub.ac.uk)

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 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 ), 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 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 and additional details can be obtained from http://www.pessto.org (via WISeREP) and the IAU Transient Name Server.

 
Survey Name | IAU Name  | RA (J2000)  | Dec (J2000) | Disc. Date | Source | Disc Mag |  z    | Type   | Phase   | Notes 
ASASSN-17ky | AT2017gda | 16:23:11.76 | +01:45:17.6 |  20170817  | ASASSN |  17.20   | 0.03  | -      | -       | (1) 
Gaia17cbx   | AT2017gex | 17:42:50.83 | -52:22:42.2 |  20170813  | Gaia   |  17.74   |  -    | -      | -       | (2) 
ATLAS17jnd  | SN2017gcy | 00:20:51.48 | -15:31:13.0 |  20170814  | ATLAS  |  18.86   | 0.061 | Ia     | at max  | 
PS17eai     | SN2017gfe | 01:17:34.47 | -25:46:32.2 |  20170810  | PS1    |  19.57   | 0.060 | Ia     | >20d    | (3) 
PS17eam     | SN2017gfd | 01:47:13.68 | -28:09:14.0 |  20170809  | PS1    |  18.49   | 0.058 | Ia     | +10d    | (4) 
ATLAS17jce  | SN2017fur | 00:39:42.87 | +23:16:35.4 |  20170722  | ATLAS  |  19.09   | 0.057 | Ia     | +11d    | (5) 
PS17edj     | AT2017gff | 02:30:45.31 | -45:07:02.0 |  20170815  | PS1    |  18.45   | 0.143 | AGN    | -       | 
Gaia17cbp   | AT2017gci | 06:46:45.02 | -27:14:55.8 |  20170812  | Gaia   |  17.13   | 0.09  | SLSN-I | pre-max | (6) 
 

(1) Spectrum taken under poor seeing conditions and is dominated by host galaxy light.
(2) Blue relatively featureless continuum.
(3) Best spectral match from SNID is SN 1997br at +38 d.
(4) Best spectral match from SNID is SN 1995E at +10 d.
(5) Best spectral match from SNID is SN 1991T at +11 d.
(6) Spectrum confirms SLSN-I nature reported in ATEL #10650 at z=0.09. The redshift was wrongly reported in the table of ATEL #10650 but was correct in the footnote.