ePESSTO spectroscopic classification of optical transients

ATel #10732; M. Gromadzki, K. Rybicki (Warsaw Observatory), M. Fraser, E. Callis (University College Dublin), J. Anderson (ESO), A. De Cia (Weizmann), I. Manulis (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. Young (QUB), A. Moller, B. Tucker, B. Zhang, B. Schmidt (Australian National University), L. Wyrzykowski,(Warsaw Observatory, Poland), Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI)
on 11 Sep 2017; 15:38 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (morgan.fraser@ucd.ie)

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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 SkyMapper survey (Scalzo et al. ATel #5480), the OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), 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 Sept. 10, 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 
SMT17snm    | SN2017gih | 21 03 01.03 | -49 19 03.7 | 20170818   | SkyMapper | 19.7     | 0.04 | II   | +2w   |  
-	    | AT2017glg | 23 03 14.80 | +08 52 54.9 | 20170902   | TNS       | 15.5     | 0.02 | -    | -     | (1) 
SN17tet     | AT2017gpp | 22 07 46.93 | -44 12 44.6 | 20170831   | SkyMapper | 19.5     | 0.06 | ?    | ?     | (2) 
ATLAS17kgv  | SN2017glz | 00 12 51.24 | -22 51 42.0 | 20170816   | ATLAS     | 20.3     | 0.05 | Ia   | ~max  | 
ATLAS17khl  | AT2017grk | 01 21 59.84 | -01 02 24.6 | 20170829   | ATLAS     | 20.3     | 0.06 | AGN  | -     | (3) 
ATLAS17kht  | SN2017goz | 23 19 14.66 | -11 31 13.6 | 20170725   | ATLAS     | 20.3     | 0.07 | Ia   | +9d   |  
ATLAS17kjl  | SN2017grl | 00 34 04.57 | -10 33 37.9 | 20170805   | ATLAS     | 19.7     | 0.10 | Ia   | +1w   | (4) 
Gaia17cet   | SN2017glk | 03 28 57.15 | -07 05 39.4 | 20170831   | Gaia      | 18.9     | 0.07 | Ia   | +1w   | (5) 
OGLE17ory   | -         | 00 56 07.57 | -68 23 33.2 | 20170905   | OGLE      | 18.2     | 0.02 | II   | +1w   |  

(1) Not visible on acquisition image.
(2) Offset from nucleus of host galaxy, transient shows a blue continuum, featureless apart from narrow (unresolved) Halpha emission at z=0.06.
(3) Spectrum dominated by narrow Balmer, O emission lines. Blue continuum below ~5000 Ang.
(4) Also found by MASTER as MASTERJ003404.53-103337.9 (ATel #10688). Matches to 91T-like SNe.
(5) Narrow Halpha is likely associated with host, as the transient lies in the galaxy nucleus.