ePESSTO spectroscopic classification of SN 2018ihv

ATel #12226; M. Berton (FINCA), E. Congiu (Padova), A. Reguitti (Padova), A. Pastorello (Padova), A. Fiore (Padova), T-W. Chen (MPE), R. Cartier (CTIO), C. Inserra (Southam pton), 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. M cBrien (QUB), D. E. Wright (Univ. of Minnesota)
on 18 Nov 2018; 13:24 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrea Pastorello (andrea.pastorello@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 classification. The target is supplied by the ATLAS survey (see Tonry et al. (2011, PASP, 123, 58) and Tonry et al., ATel #8680). Information on the targets was taken from the IAU TNS list (see https://wis-tns.weizmann.ac.il/).

The observation was performed with the ESO New Technology Telescope at La Silla on 2018 November 18.05 (UT), equipped with EFOSC2 and Grism 13 (3985-9315A, 18A resolution).

The classification was done with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and GELATO (Harutyunyan et al., 2008, A&A, 488, 383). The classification spectrum 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 |  Discovery Mag.  |    z     |  Type  |  Phase | Notes 
ATLAS18ysb    | SN 2018ihv  | 00:12:32.68 | +23:43:38.30 | 2018-11-09.41  | ATLAS  | 19.43 (c-ATLAS)  |  0.046   | II     | early | (1) 
 
(1) The low signal-to-noise spectrum shows a blue continuum, with superposed H and He I 5876 A features, suggesting that SN 2018ihv is a Type II SN  
about two weeks after the explosion. The ejecta velocity, estimated with the FWHM of Hgamma, is about 6500 km/s. The redshift of the host galaxy is  
determined from the wavelengths of the main SN features.