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ePESSTO spectroscopic classification of optical transients

ATel #11109; S. Jones, C. R. Angus, M. Smith (Southampton), C. Frohmaier (Portsmouth), R. E. Firth (Southampton), K. Maguire (QUB), T. W. Chen (MPE), L. Galbany (Pitt.), C. Inserra (Southampton), E. Kankare (QUB), S. J. Smartt (QUB), D. Wright (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), L. Wyrzykowski (Warsaw Observatory, Poland), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), O. McBrien, K. W. Smith (QUB), K. C. Chambers, H. Flewelling, M. Huber, T. Lowe. E. Magnier, A. Schultz, C. Waters, R. J. Wainscoat, M. Wilman (IfA, Univ. Hawaii)
on 29 Dec 2017; 18:04 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Robert Firth (r.e.firth@soton.ac.uk)

Subjects: Optical, Supernovae

Referred to by ATel #: 11218

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), OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), Pan-STARRS Survey for Transients (see Chambers et al. 2016, arXiv:1612.05560, and http://pswww.ifa.hawaii.edu ). All observations were performed on the ESO New Technology Telescope at La Silla on 2017 Dec 28, 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 
OGLE17jan  | SN2017jan | 03 07 22   | -64 23 00.9 |  20171218  |  OGLE    |   21.03   | 0.396 |  SLSN-I | -7 to -4                | (1) 
ATLAS17nxr | SN2017jfd | 09 58 13   | +00 33 39.4 |  20171117  |  ATLAS   |   20.39   | 0.082 |  Ia     | +4 to +7                | (2) 
ATLAS17nwt | SN2017jfa | 07 27 46   | +06 28 00.9 |  20171123  |  ATLAS   |   20.35   | 0.033 |  II     | -3 to +3                | (2) 
PS17fjs    | SN2017jeb | 08 26 18   | +20 39 52.2 |  20171223  |  PS1     |   20.14   | 0.064 |  I      | several weeks after max | (3) 

(1) Object has an unusually long rise-time of >100 days and the spectrum shows broad absorption features typical of SLSNe I/Ic consistent with v_exp ~18,000km/s at this redshift
(2) Redshift from host galaxy
(3) Noisy spectrum, consistent with a Ia or Ic several weeks post-maximum at the quoted redshift of the host galaxy