ePESSTO spectroscopic classification of optical transients
ATel #12150; E. Congiu (Padova), M. Berton (FINCA), S. Benetti (Padova), A. Fiore (Padova), A. Pastorello (Padova), A. Reguitti (Padova), L. Tomasella (Padova), C. Barbarino (Stockholm), M. Fraser (UCD), S. C. Williams (Lancaster), C. Inserra (Southampton), E. Kankare (QUB), K. Maguire (QUB), S. J. Smartt (QUB), D. R. Young (QUB), O. Yaron (Weizmann), I. Manulis (Weizmann)
on 31 Oct 2018; 11:49 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrea Pastorello (andrea.pastorello@oapd.inaf.it)
Subjects: Optical, Supernovae, Transient
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 classification. The target was supplied by the Backyard Observatory Supernova Search (BOSS; http://bosssupernova.com/ ), and selected from the IAU TNS list (see https://wis-tns.weizmann.ac.il/).
The observation was performed on the ESO New Technology Telescope at La Silla on 2018 October 31.31 UT, using 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). 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 | Discovery Mag. | z | Type | Phase | Notes
| SN 2018hmy | 08:31:36.39 | -59:47:08.80 | 2018-10-21.65 | BOSS | 16.8 (clear) | 0.021562 | Ia | 2-3 weeks | (1)
(1) The spectrum matches that of a normal Type Ia SN 2-3 weeks after the B-band maximum.
The ejecta velocity, obtained from the wavelength of the Si II 635.5 nm minimum, is about 9500 km/s.
The redshift of the host galaxy ESO 124-G018 is from West et al. 1981, A&AS, 46, 57.
