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ePESSTO spectroscopic classification of optical transients

ATel #10689; D. Homan (Univ. of Edinburgh), J. Lyman (Univ. of Warwick), L. Galbany (U. of Pittsburgh), J. P. Anderson (ESO), 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), I. Manulis (Weizmann), L. Wyrzykowski (Warsaw Observatory, Poland)
on 31 Aug 2017; 16:43 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Lluis Galbany (lluisgalbany@gmail.com)

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 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 OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), and the targets are from the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts). All observations were performed on the ESO New Technology Telescope at La Silla on 2017-08-30, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024), and DASH (https://github.com/daniel-muthukrishna/DASH). 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-17lj | SN2017gjd | 20:03:44.89 | -27:59:19.1 |  20170829  | ASASSN |   16.50  | 0.023 | Ia   | -1d   | 
OGLE17ojj   |           | 00:40:04.69 | -64:37:37.0 |  20170727  | OGLE   |   20.62  | 0.068 | Ia   | max   | (1) 
AT2017ghm   |           | 08:11:46.19 | +00:51:28.6 |  20170810  | Gaia   |   20.31  |       |      |       | (2) 
OGLE17nfr   |           | 02:01:26.89 | -65:41:48.1 |  20170816  | OGLE   |   20.65  |       |      |       | (3) 

(1) Early-type galaxy contamination
(2) Very noisy spectrum due to disfavourable conditions.
(3) Very noisy spectrum due to disfavourable conditions.