ePESSTO spectroscopic classification of optical transients

ATel #12020; T. Wevers (Cambridge), M. Gromadzki (Warsaw), G. Pignata (UNAB/MAS), O. Rodriguez (UNAB/MAS), J. Anderson (ESO), M. T. Botticella (INAF-Capodimonte), T.-W. Chen (MPE), C. Inserra (Southampton), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), J. Tonry, L. Denneau., A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST) A. Rest (STScI), K. W. Smith, O. McBrien (QUB), D. E. Wright (Univ. of Minnesota)
on 8 Sep 2018; 22:48 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giuliano Pignata (pignago@gmail.com)

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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 Zwicky Transient Factory (https://www.ztf.caltech.edu/). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 September 7, 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 
 ATLAS18unl   | AT2018fwv | 19:55:09.31 | -28:51:24.9 |  20180906  |  ATLAS  |   18.4   |   ?   |   ?   |   ?   |  (1) 
 ATLAS18ukb   | AT2018fvq | 21:31:32.38 | -27:15:43.5 |  20180906  |  ATLAS  |   19.3   | 0.073 |  Ia   |  -4d  |  
 ATLAS18udw   | AT2018frk | 22:46:16.77 | -07:50:13.9 |  20180901  |  ATLAS  |   19.2   | 0.080 |  Ia   |  +2d  |  (2) 
 ASASSN-18tq  | AT2018fqn | 22:39:38.20 | -15:05:10.1 |  20180902  |  ASASSN |   17.8   | 0.052 |  Ia   |  -6d  |  (3) 
 ASASSN-18tp  | AT2018fqd | 20:51:51.48 | -36:50:13.3 |  20180901  |  ASASSN |   17.2   | 0.039 |  Ia   |   0d  |   
 ATLAS18ukk   | AT2018fvy | 01:32:16.22 | -33:06:05.6 |  20180906  |  ATLAS  |   17.9   | 0.036 |  Ia   |  -5d  | 
 ATLAS18uke   | AT2018fvx | 05:49:29.39 | -19:33:20.8 |  20180906  |  ATLAS  |   17.8   | 0.029 |  ?    |   ?   |  (4) 
 ASASSN-18uc  | AT2018fuj | 04:30:58.48 | -26:46:54.0 |  20180905  |  ASASSN |   18.4   | 0.051 |  Ia   |  +3d  |   
 ASASSN-18ud  | AT2018fuk | 05:45:08.16 | -79:23:47.5 |  20180905  |  ASASSN |   17.0   | 0.018 |  Ia   |  -6d  |   
 ZTF18abqbuaj | AT2018fmt | 01:21:00.86 | -13:51:46.6 |  20180827  |  ZTF    |   18.8   | 0.055 |  Ibn  |  +2w  |   

(1) The spectrum appears blue and featureless
(2) ATLAS18udw was observed as part of the GREAT survey (Chen et al. 2018arXiv180804382C), having a black body temperature of T_BB~16000+/-2000 K obtained from the photometry taken on 06.09.2018 with griz= 18.32,18.50,18.89,19 mag.
(3) ASASSN-18tq was observed as part of the GREAT survey (Chen et al. 2018arXiv180804382C), having a black body temperature of T_BB~23000+/-4000K K obtained from the photometry taken on 06.09.2018 with griz= 17.02,17.32,17.9,17.98 mag.
(4) Blue continuum with weak lines compatible with a type I SN