ePESSTO spectroscopic classification of optical transients

ATel #12493; E. Palazzi (INAF-OAS Bologna), R. Carini (INAF-OAR), S. Benetti, A. Fiore, L. Tomasella (INAF-OAPd), N. Elias-Rosa (ICE-CSIC), M. Gromadzki (Univ. Warsaw), C. Inserra (Univ. Cardiff), E. Kankare (Univ. Turku), K. Maguire, S. J. Smartt (QUB), O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann), R. Roy (IUCAA, India), J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, Univ. of Hawaii), B. Stalder (LSST), A. Rest (STScI), K. W. Smith (QUB), O. McBrien, D. E. Wright (Univ. of Minnesota), L. Wyrzykowski,(Warsaw Observatory, Poland)
on 11 Feb 2019; 16:07 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

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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. The targets were supplied by the ATLAS survey, see Tonry et al. (2011, PASP, 123, 58) and Tonry et al. (ATel 8680), OGLE-IV Real-time Transient Search (Wyrzykowski et al., 2014 arxiv:1409.1095; http://ogle.astrouw.edu.pl/ ), 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 Facility (https://www.ztf.caltech.edu/; Kulkarni et al. 2018, ATel 11266) data stream processed through the Lasair broker (http://lasair.roe.ac.uk/). Observations were performed on the ESO New Technology Telescope at La Silla on 2019-02-10, using EFOSC2 and Grism 13 (3685-9315, 21.2A 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 
ATLAS19cdg  | SN2019ako | 06 13 56.29  | -38 02 23.8 |  20190201  | ATLAS  |  18.538  | 0.029   | Ia    |  -3   | (1) 
ZTF19aainjpz|           | 04 19 58.10  | -07 15 24.5 |  20190209  | ZTF    |  19.40   | 0.032419| Ia-91T|  -8   | (2) 
OGLE19all   | SN2019all | 06 06 51.40  | -75 21 47.8 |  20190131  | OGLE   |  19.103  | 0.037473| Ibc   |  max  | (3) 
ASASSN-19bt | AT2019ahk | 07 00 11.54  | -66 02 24.1 |  20190129  | ASAS-SN|  18      | 0.026211| TDE   |  -    | (4) 

(1) The redshift is from the spectral features fit. The expansion velocity deduced from the SiII 635.5 nm absorption is about 10700 km/s.
(2) The redshift of the host galaxy is from Jones et al. 2009, 6dF Galaxy Survey Data Release 3 (via NED).
(3) The redshift of the host galaxy is from Jones et al. 2009, 6dF Galaxy Survey Data Release 3 (via NED).
(4) The classification of AT2019ahk was already discussed by Cacella et al. 2019 (ATel #12462). The spectrum is still dominated by a blue continuum, but now a very broad (FWHM~25500 km/s) He II 468.6 nm and a broad (~13700 km/s) H-alpha emissions are clearly visible.