Spectroscopic Classifications of Optical Transients with Lick Shane + Kast
ATel #14651; S. Tinyanont, K. Taggart, R. J. Foley (UCSC)
on 21 May 2021; 16:33 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Samaporn Tinyanont (stinyanont@ucsc.edu)
Subjects: Optical, Supernovae
We report the classification of the optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope, made on 2021 May 19 UT. The targets were supplied by ATLAS, and ZTF. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ATLAS21pgh | AT2021mqh | 11:39:50.482| -07:36:26.76 | 0.023 | II |pre-peak| (1)
ZTF18actytgu | AT2021lyz | 00:44:07.889| +30:21:03.59 | 0.019 | Ia | +5 day | (2)
Notes:
When the redshift is given to 2 significant figures, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy.
(1) We find narrow emission lines with electron scattering wings, indicative of flash ionization. The H alpha line is well described by a Lorentzian profile with a FWHM of 930 km/s.
(2) We measure a Si velocity of -11,000 km/s.
