Spectroscopic Classifications of Transients with Keck II + ESI
ATel #15963; K. Taggart, K. W. Davis, R. J. Foley (UCSC)
on 27 Mar 2023; 12:08 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)
Subjects: Optical, Supernovae, Transient
We report the following the classification of three transients from spectroscopic observations with ESI on the Keck II telescope, made on 2023 Mar 27 UT. The targets were supplied by ASAS-SN, ATLAS, and PSST. The classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS23aqq | AT2023diq | 14:34:42.105 | +03:17:49.84 | 0.027 | IIb | +0d | (1)
ATLAS23dwb | AT2023dok | 12:26:06.432 | +09:38:12.82 | 0.062 | IIb | +10d | (2)
ASASSN-23ca | AT2023dwu | 09:23:16.894 | +72:03:48.64 | 0.012 | SN | | (3)
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) We measure an H-alpha velocity of -13,900 km/s.
(2) We measure an H-alpha velocity of -5,600 km/s.
(3) The spectrum is a blue featureless continuum.
