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ePESSTO spectroscopic classification of optical transients

ATel #10944; F. Onori (SRON/RU), G. Cannizzaro (SRON/RU), G. Dimitriadis (Southampton), Chris Frohmaier (Portsmouth), Annalisa De Cia (ESO), Joe Lyman (Warwick), 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), J. Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI), Z. Kostrzewa-Rutkowska (SRON/RU), P. G. Jonker (SRON/RU).
on 10 Nov 2017; 11:22 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: P.G. Jonker (p.jonker@sron.nl)

Subjects: Optical, Request for Observations, Supernovae

Referred to by ATel #: 10953

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 La Silla-Quest survey (see Baltay et al., PASP, 2013, 125, 683), 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, Nov. 8, 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 
ATLAS17mwk  | AT2017hrg | 03 02 07.71| -11 22 00.5 |  20170926  | ATLAS  |   20.92  | 0.045 |  Ic  | +4d   | (1) 
ATLAS17mwu  | AT2017hrm | 07 08 24.79| -23 47 21.9 |  20171005  | ATLAS  |   18.84  | 0.044 |  Ia  | +6d   | (2) 
ATLAS17mwz  | AT2017hrq | 04 20 14.9 | -43 49 24.1 |  20171029  | ATLAS  |   16.98  | 0.055 |  II  |       | (3) 

(1) Redshift estimated from narrow emission lines in the spectrum
(2) Redshift from the SN differs from that reported for the nearby (host?) galaxy ESO 491- G 019 which is at z=0.027
(3) Redshift estimated from narrow Balmer lines in the spectrum. Hot blue continuum, absolute mag of -20, host has no record of variability. A bright Type IIn or a nuclear transient related to the central black hole. Follow-up at other wavelengths encouraged.