Spectroscopic Classifications of Optical Transients with Keck I + LRIS
ATel #14833; K. Davis, S. Tinyanont, M. R. Siebert, K. Taggart, R. J. Foley (UCSC), C. Angus (DARK)
on 7 Aug 2021; 04:42 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Kirsty Taggart (k.taggart@ucsc.edu)
Subjects: Optical, Supernovae
We report the following classifications from spectroscopic observations with the LRIS spectrograph on the Keck I telescope, made on 2021 Aug 6 UT. The targets were supplied by AMPEL and ALeRCE (selected from the ZTF data stream), ATLAS, ZTF, and YSE. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
PS21grn | AT2021qxq | 15:58:19.830 | +27:22:33.92 | 0.0886 | Ia | +27d |
ZTF21abihsrg | AT2021rdf | 00:09:55.673 | +19:58:33.77 | 0.109 | Ia | +20d |
ZTF21ablkaqq | AT2021tup | 22:17:05.683 | +04:50:44.61 | 0.12 | Ia | +12d | (1)
ATLAS21bcpx | AT2021ukp | 15:55:46.030 | +25:26:28.16 | 0.14 | Ia | +0d | (2)
ZTF21abpwaci | AT2021urb | 21:34:26.065 | +09:11:01.96 | 0.127 | Ic | +0d |
ZTF21abrddfm | AT2021uxm | 01:00:45.335 | -16:47:19.17 | 0.10 | Ia | -4d | (3)
PS21ims | AT2021vaw | 00:23:14.035 | +16:10:34.15 | 0.11 | Ia | -8d | (4)
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 a Si II velocity of -11,000 km/s.
(2) We measure a Si II velocity of -11,700 km/s.
(3) We measure a Si II velocity of -12,100 km/s.
(4) We measure a Si II velocity of -14,000 km/s.
