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ePESSTO spectroscopic classification of optical transients

ATel #10793; S. T. Hodgkin (Cambridge), K. Rybicki (Warsaw Observatory) M. Fraser, E. Callis (University College Dublin), R. Cartier (CTIO), T.-W. Chen (MPE), I. Manulis, N. Knezevic (Weizmann), C. Inserra (Southampton), 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. R. Young, D. Wright (QUB), 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 28 Sep 2017; 14:51 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (morgan.fraser@ucd.ie)

Subjects: Optical, Cataclysmic Variable, Supernovae, Transient

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 the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel #8680), the 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 ), and the Puckett Observatory Supernova Search and K. Itagaki, via the IAU TNS list (see https://wis-tns.weizmann.ac.il/). All observations were performed on the ESO New Technology Telescope at La Silla on 2017 Sept. 27, 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-17my  | AT2017gwx | 21:55:48.81 | -17:48:56.5 | 20170926   | ASASSN    | 16.3     | 0     | CV   | -     |      
PS17eqv      | SN2017gwt | 22:02:05.06 | -07:07:11.3 | 20170912   | PSST      | 20.7     | 0.056 | Ia   | +3d   |     
-            | SN2017gwy | 22:23:34.51 | +11:51:35.9 | 20170926   | TNS       | 18.0     | 0.030 | Ia   | -7d   | 
ATLAS17lau   | AT2017gum | 02:38:37.95 | -28:01:01.2 | 20170917   | ATLAS     | 19.3     | ?     | ?    | ?     | (1)     
-            | SN2017gww | 00:03:49.21 | +07:28:00.1 | 20170926   | TNS       | 17.9     | 0.017 | II   | +3d   | (2)         

(1) Faint spectrum obtained with very low S/N. Spectrum appears to be that of a (possibly early type) galaxy, with no obvious contribution from transient. On the acquisition image, the host is visible as a faint, extended source, with no additional source that may be transient.
(2) Spectrum shows a blue continuum, with broad, weak Halpha, as typically seen in a Type II SN a few days after explosion.