Classification of ZTF19aarmtgu = AT2020urj as a type Ia SN before maximum
ATel #14082; Tapio Pursimo (NOT, LaPalma, Spain), Michel Dennefeld (IAP-Paris & Sorbonne University, Andrew Lawrence (Univ. of Edinburgh), Martin Ward (Univ. of Durham) and Roopesh Ojha (Nasa Goddard SFC)
on 10 Oct 2020; 12:49 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michel Dennefeld (dennefel@iap.fr)
Subjects: Optical, Supernovae
T. Pursimo (NOT, LaPalma, Spain), M. Dennefeld (IAP-Paris and Sorbonne University), A. Lawrence (Univ. of Edinburgh), M. Ward (Univ. of Durham) and R. Ojha (NASA Goddard) report that they obtained a spectrum of the transient ZTF19aarmtgu = AT2020urj which appeared in the center of the Seyfert 2 galaxy WISEA J080636.85+102727.8 (aka SDSS J080636.87+102726.7). The spectrum was taken with ALFOSC at the Nordic Optical Telescope on Oct. 9 at 04.25h UT and covers the range 370.0-966.0 nm with a resolution of 1.6 nm (4 pixels). Classification was made with the help of Gelato (Harutyunyan et al. 2008, A&A, 488,383), which indicates a type Ia SN about one week before B maximum. With a measured redshift of the host galaxy of 0.04185, the SiII 635.5 line gives an expansion velocity of 11230 km/sec.
