LIGO/Virgo S190718y: Classification of AT 2019lqn / Gaia19dct as a Type Ia Supernova
Abstract
We obtained an optical spectrum of the transient AT 2019lqn / Gaia19dct (discovered by Gaia within the probability map of S190718y; LIGO/Virgo Collaboration GCN 25087, Kostrzewa-Rutkowska et al. GCN 25145) on 2019 July 24.8 UT with the robotic FLOYDS instrument mounted on the Las Cumbres Observatory 2-meter telescope in Siding Spring, Australia. Using Superfit (Howell et al. 2005, ApJ, 634, 1190) and SNID (Blondin & Tonry 2007, ApJ, 666, 1024) we find good fits to normal Type Ia supernovae at a redshift of z=0.076, and a phase of 9 days after peak. The spectrum is available on the Transient Name Server.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2019
- Bibcode:
- 2019GCN.25152....1A