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ePESSTO spectroscopic classification of optical transients

ATel #11192; F. Bufano (INAF Catania), M. Berton (Uni Padova), C. Vogl (MPA), A. Floers, S. Taubenberger, J. Anderson (ESO), L. Galbany (Pittsburgh), S. Schulze, O. Yaron, I. Manulis (Weizmann), C. Inserra (Southampton), E. Kankare, K. Maguire, S. J. Smartt, D. Young, K. W. Smith, O. McBrien (QUB), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), L. Wyrzykowski (Warsaw Observatory)
on 17 Jan 2018; 19:00 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefan Taubenberger (tauben@mpa-garching.mpg.de)

Subjects: Optical, Supernovae

Referred to by ATel #: 11316

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 ) and the OGLE-IV Real-time Transient Search (Wyrzykowski et al. 2014, arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 Jan 16, 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 
ATLAS17nzb  | AT2017jis | 00 41 07.10 | -09 26 52.6 | 20171209   | ATLAS   |   18.9   | 0.047 | galaxy |        | (1) 
ATLAS17nqh  | SN2017ixl | 00 57 24.55 | -00 46 03.9 | 20171209   | ATLAS   |   18.9   | 0.05  |   Ia   | >+20   | (2) 
ATLAS18eaa  | SN2018dv  | 02 32 01.03 | +08 35 16.1 | 20180105   | ATLAS   |   18.7   | 0.031 |   Ia   | at max | 
OGLE18be    | SN2018be  | 01 08 49.00 | -76 42 47.5 | 20180106   | OGLE    |   19.4   |       |   I    |        | (3) 
ASASSN-18ae | SN2018br  | 03 07 52.65 | -45 44 25.1 | 20180106   | ASAS-SN |   18.1   | 0.063 |   Ia   | at max | 

(1) The spectrum strongly resembles the SDDS DR14 spectrum of the host galaxy SDSS J004107.10-092653.3.
(2) Redshift from SNID.
(3) The spectrum is in fair agreement with strongly reddened Type I SNe (B-V colour excess of 0.5 to 1.0 mag). SNID finds matches with 99aa-like SNe Ia at z~0.03, with 91T-like SNe at z~0.01 to 0.02, and with normal or broad-lined SNe Ic at z~0.02 to 0.04. However, the unknown redshift and the possible contamination by host-galaxy light hinder a more secure classification.