ePESSTO spectroscopic classification of optical transients

ATel #12257; M. Pursiainen (Southampton), N. Castro-Segura (Southampton), C. P. Gutierrez (Southampton), T. Muller (Southampton), J. Anderson (ESO), T.-W. Chen (MPE), C. Inserra (Cardiff), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), D. R. Young (QUB), O. Yaron (Weizmann), I. Manulis (Weizmann), J. Tonry (IfA, Univ. of Hawaii), L. Denneau (IfA, Univ. of Hawaii), A. Heinze (IfA, Univ. of Hawaii), H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith (QUB), O. McBrien (QUB), D. E. Wright (Univ. of Minnesota), R. Cartier (CTIO), Ilya Mandel (U. Birmingham)
on 2 Dec 2018; 20:01 UT
Credential Certification: Claudia Gutierrez (c.p.gutierrez-avendano@soton.ac.uk)

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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 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 ATLAS survey (see Tonry et al., 2011, PASP, 123, 58). All observations were performed on the ESO New Technology Telescope at La Silla on 2018 December 1, 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 
ASASSN-18aar | SN2018jgn | 00:02:56.0 | -26:54:52.9 |  20181201  |  ASASSN |   17.3   | 0.067  |  Ia  | around max | (1) 
ATLAS18zoe   | SN2018jfv | 01:03:03.6 | +27:28:14.2 |  20181129  |  ATLAS  |   18.5   | 0.061  |  Ia  | around max |  
ASASSN-18aaj | SN2018jff | 23:48:06.4 | -44:58:49.0 |  20181126  |  ASASSN |   17.4   | 0.063  |  Ia  | +4 to +7   | (1) 
ASASSN-18aaf | SN2018jbm | 01:42:17.6 | -45:24:51.9 |  20181126  |  ASASSN |   17.6   | 0.0625 |  Ia  | +4 to +7   | (1) 
ATLAS18zoj   | SN2018jfz | 03:20:18.7 | -00:17:47.0 |  20181128  |  Atlas  |   19.1   |   ?    |  ?   |            | (2) 
 

(1) Redshift obtained from the host galaxy

(2) The spectrum is blue and featureless. No redshift information available, however, some bumps observed in the spectrum can be consistent with Halpha and Hbeta at z~0.04.
AT2018jfz was observed as part of the GREAT survey (Chen et al. 2018, ApJ, 867L, 31), having a black body temperature of T_BB = 12000 +/- 1000K obtained from the photometry taken on 2018 December 1 with griz= 18.8,18.93,19.01,19.01 mag.