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PESSTO spectroscopic classification of optical transients

ATel #9943; A. Cikota (ESO), K. W. Smith (QUB), M. Magee (QUB), C. Inserra (QUB), T.-W. Chen (MPE), J. Lyman (Univ. of Warwick), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), M. Sullivan (Southampton), S. Valenti (UC Davis), O. Yaron (Weizmann), D. Young (QUB), I. Manulis (Weizmann), J. Tonry (IfA, Univ. of Hawaii), B. Stalder (IfA, Univ. of Hawaii), L. Denneau (IfA, Univ. of Hawaii), A. Heinze (IfA, Univ. of Hawaii), H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI)
on 5 Jan 2017; 17:05 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Cosimo Inserra (c.inserra@qub.ac.uk)

Subjects: Optical, Supernovae

PESSTO, the 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), and from the ESA Gaia Photometric Science Alerts Team and DPAC (http://gsaweb.ast.cam.ac.uk/alerts) All observations were performed on the ESO New Technology Telescope at La Silla on 2017 01 04, 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 
ATLAS17abb   | SN2017ag     | 09 44 32.57 | -08 10 47.0 | 20170103   | ATLAS   | 18.52    | 0.096 | Ia            | max     | (1) 
Gaia17aag    | SN2017X      | 06 44 50.32 | -43 54 21.4 | 20170101   | Gaia    | 17.89    | 0.067 | Ia 91T-like   | +8      | (2) 
Gaia16cgd    | SN2016jfy    | 06 39 36.67 | -65 44 16.1 | 20161228   | Gaia    | 18.30    | 0.034 | Ia            | +15     | (3) 
 

(1) SNID provides good matches to normal SNe Ia around maximum light.
(2) SNID provides good matches to 91T-like SNe Ia approximately one week post-maximum.
(3) SNID provides good matches to normal SNe Ia a couple of weeks post-maximum.