ePESSTO spectroscopic classification of optical transients

ATel #11160; M. Berton (Uni Padova), F. Bufano (INAF Catania), C. Vogl (MPA), A. Floers, S. Taubenberger, A. De Cia (ESO), M. Fraser (UCD), C. Inserra (Southampton), E. Kankare, K. Maguire, S. J. Smartt, D. Young, K. W. Smith, O. McBrien (QUB), O. Yaron, I. Manulis (Weizmann), J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI)
on 12 Jan 2018; 19:49 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefan Taubenberger (tauben@mpa-garching.mpg.de)

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 ATLAS survey (see Tonry et al. 2011, PASP, 123, 58 and Tonry et al., ATel #8680), 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 IAU TNS list (see https://wis-tns.weizmann.ac.il/). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 Jan 11, 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 
AT2018ec    | SN2018ec  | 10 27 50.77 | -43 54 06.3 |  20180103  | Sunbird/TNS |   15.1   | 0.009 |  Ic  |    > +20d    | (1,2) 
ATLAS17nyv  | SN2017jir | 12 12 07.55 | -40 30 19.4 |  20171216  | ATLAS       |   18.5   | 0.03  |  Ia  | +11d to +20d | (3) 
ASASSN-18aa | SN2018bg  | 05 11 47.86 | -40 11 44.1 |  20180107  | ASAS-SN     |   16.5   | 0.03  |  Ia  |  +0d to +7d  | (3,4) 
Gaia18acr   | SN2018eh  | 09 32 03.05 | -24 48 56.5 |  20180109  | GaiaAlerts  |   18.6   | 0.06  |  Ia  |  -7d to -4d  | (3) 

(1) Strongly affected by host contamination, and roughly 3 to 4 mag of extinction in the V band (based on SED comparisons with other SNe Ic).
(2) Host galaxy redshift from NED.
(3) Redshift from SNID.
(4) Reasonable matches are obtained with normal SNe Ia around maximum light up to ~1 week after maximum light.