Spectroscopic Classifications of AT 2020dvr with the Lick Shane telescope
ATel #13542; G. Dimitriadis, R. J. Foley (UCSC), C. Aganze, A. Burgasser, R. Gerasimov, C. Hsu, R. Low, C. Theissen (UCSD)
on 4 Mar 2020; 17:48 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Georgios Dimitriadis (gdimitri@ucsc.edu)
Subjects: Optical, Supernovae
We report the classification of AT 2020dvr from spectroscopic observations with the Kast spectrograph on the Shane telescope. The targets was supplied by ATLAS. All observations were made on 2020 Mar 4 UT. The classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ATLAS20hhc | AT2020dvr | 09:54:35.14 | -19:53:14.27 | 0.013 | Ia | -10 d | (1)
Notes:
When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. (1) Spectrum is consistent with a young Type Ia supernova in the nearby galaxy ESO 566- G 027 (D = 57 Mpc). Assuming a distance modulus of 33.7 mag and assuming no extinction from the host galaxy, the SN was discovered at ~ -16.7 mag in the ATLAS o-band. We measure an Si II 6355 velocity of -13,500 km/s. Additionally, there is a spectral feature at ~6,300 Angstrom (rest wavelength), consistent with C II 6580 absorption. Assuming it is C II 6580, we measure a velocity of -13,400 km/s. Initial analysis of the spectrum shows a high-velocity component to the Ca IR feature with a velocity of -25,500 km/s.
We thank the Lick Observatory staff, especially Paul Lynam, for helping with these target-of-opportunity observations.
