Spectroscopic Classifications of AT2023dtc in NGC 2613 with Keck I + LRIS
ATel #15954; K. W. Davis, R. J. Foley (UCSC)
on 21 Mar 2023; 07:28 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)
Subjects: Optical, Supernovae
We report the following the classification of AT2023dtc from spectroscopic observations with the LRIS spectrograph on the Keck I telescope, made on 2023 Mar 21 UT. The target was supplied by ATLAS. The classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ATLAS23edi | AT2023dtc | 08:33:17.575 | -22:57:45.03 | 0.006 | Ib | -10d | (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) There is a red continuum consistent with E(B-V) ~ 1 mag when matching to template spectra. We measure a He I 6678 absorption velocity of -14,800 km/s.
We thank the Keck Observatory staff, M. Lundquist, M. Gull, and D. Weisz for their cooperation in the execution of this observation.
