SALT spectroscopy of MASTER OT J120315.71-525727.2 (AT 2019gtv): a SN type Ia supernova
ATel #12862; D. A. H. Buckley (South African Astronomical Observatory), M. Gromadzki (U. Warsaw), V. Lipunov (SAI, Lomonosov Moscow State University), S. B. Potter (SAAO), I. Monageng (SAAO))
on 12 Jun 2019; 09:34 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: David Buckley (dibnob@saao.ac.za)
Subjects: Optical, Gravitational Waves, Supernovae
On 2019 June 7.848 (JD 2458642.3746) we obtained a spectrum with SALT of MASTER OT J120315.71-525727.2, a new optical transient reported by Lipunov et al. (GCN #24737; ATel #12834) associated with the galaxy PGC3074107 and discovered during a search for an optical counterpart to the LIGO/Virgo GW event S190602aq (Shawhan et al. GCN #24717). The combined 2 x 1000s spectra covered the region 4200-7260 Å with a resolving power of R ~1000 and was classified using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) as a SN Ia, +4 to +6 days after maximum, with z = 0.042 ± 0.003. As S190602aq is most likely to be binary black hole merger event, MASTER OT J120315.71-525727.2 is clearly not associated with this event.
SALT spectrum of MASTER OT J120315.71-525727.2
