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ePESSTO spectroscopic classification of optical transients

ATel #10766; Z. Kostrzewa-Rutkowska (SRON), S. T. Hodgkin (Cambridge), M. Gromadzki (Warsaw Observatory) M. Fraser, E. Callis (University College Dublin), L, Galbany (U. Pittsburgh), J. Lyman (Warwick), I. Manulis, (Weizmann), 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), Tonry, B. Stalder, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), A. Rest (STScI).
on 21 Sep 2017; 17:01 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Morgan Fraser (morgan.fraser@ucd.ie)

Subjects: Optical, Supernovae, Transient

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) and the Tsinghua-NAOC Transient Survey. All observations were performed on the ESO New Technology Telescope at La Silla on 2017 Sept. 20, 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 
ATLAS17kxb   | SN2017gtw | 22 34 11.61 | -28 47 14.4 | 20170911   | ATLAS     | 18.5     | 0.064 | Ia   | 10d   | 
-            | SN2017gut | 23 31 56.56 | +26 19 32.9 | 20170917   | TNTS      | 19.4     | 0.031 | SN?  | ~4d?  | (1) 
ATLAS17kwi   | SN2017gto | 00 12 03.86 | +01 06 11.8 | 20170914   | ATLAS     | 19.4     | 0.086 | Ia   | 3d    | 
ATLAS17kwe   | SN2017gts | 02 18 36.13 | +05 15 15.4 | 20170914   | ATLAS     | 19.0     | 0.09  | Ia   | 10d   | 
ATLAS17lax   | AT2017guq | 21 48 16.09 | -21 10 59.7 | 20170917   | ATLAS     | 19.3     | -     | -    | -     | (2)   

(1) Blue, featureless continuum. The source lies close to KUG 2329+260, and at the distance of this galaxy would have an absolute magnitude -16.2. This magnitude and spectrum is consistent with a young Type II SN a few days after explosion.
(2) Not visible on acquisition image.