ePESSTO spectroscopic classification of optical transients

ATel #11616; P. Clark, O. McBrien, E. Kankare, K. Maguire (QUB), M. T. Botticella (INAF-Capodimonte), M. Dennefeld (IAP, Paris), Z. Kostrzewa-Rutkowska (SRON/RU), G. Leloudas (DARK), C. Inserra (Southampton), S. J. Smartt (QUB), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann)
on 7 May 2018; 18:39 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Erkki Kankare (e.kankare@qub.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 ); the IAU TNS list (see https://wis-tns.weizmann.ac.il/); and 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 2018 May 6, 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-18jk | SN2018bfa | 10 15 30.2 | -72 42 37.0 |  20180505  | ASAS-SN |   16.8   | 0.029 | Ia      | -3 to +3   | (1) 
ASASSN-18jm | SN2018bfg | 11 41 01.9 | -33 40 47.3 |  20180505  | ASAS-SN |   17.6   | 0.053 | Ia      | -3 to +3   | (1) 
            | SN2018bbv | 15 55 48.8 | -68 52 14.4 |  20180425  | BOSS    |   17.1   | 0.010 | II      | +11 to +20 | (2) 
C17-0117    | AT2018bfs | 13 34 34.0 | -13 25 45.3 |  20180502  | TNS     |   20.6   | 0.102 | galaxy  | -          | (3) 
C17-0121    | AT2018bfv | 13 13 08.6 | -12 49 12.8 |  20180424  | TNS     |   21.9   | 0.15  | galaxy  | -          | (4)  
Gaia18bcv   | AT2018bem | 19 20 35.6 | -11 12 03.2 |  20180502  | Gaia    |   18.3   | 0.0   | stellar | -          | (5) 

(1) Normal Type Ia SN.
(2) Normal Type II SN.
(3) Low S/N spectrum. Narrow emission features are consistent with host galaxy lines at z=0.102.
(4) Low S/N spectrum likely dominated by the host galaxy. An emission feature at 7525 A could be redshifted Halpha.
(5) Blue continuum with absorption features consistent with Balmer series at z = 0.