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ePESSTO spectroscopic classification of optical transients

ATel #10674; J. Lyman (Univ. of Warwick), D. Homan (Univ. of Edinburgh), 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), J. Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI)
on 28 Aug 2017; 17:37 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 OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ) 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 AUgust 27th, using EFOSC2 and Grism 13 (3985-9315A, 18A resolution). Classifications were done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). 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 
AT2017ggw   | SN2017ggw | 02 30 26.88 | -43 00 53.0 | 2017 08 22 | BOSS   |  17.90   | 0.018 |  II  |  -1   | (1) 
ATLAS17jlp  | AT2017gis | 01 30 00.49 | -32 22 40.7 | 2017 07 26 | ATLAS  |  18.10   |       |      |       | (2) 
ATLAS17jnr  | SN2017git | 01 54 44.47 | -07 00 14.2 | 2017 08 02 | ATLAS  |  18.50   | 0.079 |  Ia  |  +15  | (3) 
ATLAS17jrl  | SN2017giu | 01 47 39.84 | -22 41 11.0 | 2017 08 12 | ATLAS  |  18.59   | 0.052 |  II  |  +10  | (4) 
ATLAS17jsb  | SN2017gir | 01 39 44.84 | -23 15 17.1 | 2017 08 14 | ATLAS  |  18.27   | 0.164 |  IIn |  +8   | (5)  
OGLE17mtb   |           | 00 40 02.29 | -67 59 32.4 | 2017 07 03 | OGLE   |  20.85   | 0.072 |  II  |  +19  | (6)   

(1) Best SNID fit to SN2004et
(2) Blue featureless continuum
(3) Best SNID fit to SN Ia-91T 1999aa
(4) Best SNID fit to SN2004et
(5) The spectrum resembles that of the type IIn SN 2012al at early phases (Tomasella et al. 2012, CBET 3033, 2; http://sngroup.oapd.inaf.it/asiago_class/class/sn2012al.png ). At the estimated redshift, the transient has an absolute magnitude of -21.2 mag, making it a SLSN
(6) Best SNID fit to SN1999gi