Spectroscopic Classifications of Optical Transients with Keck I/LRIS
ATel #11629; R. J. Foley, C. Rojas-Bravo (UCSC)
on 10 May 2018; 15:44 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)
Subjects: Optical, Supernovae
We report the following classifications of optical transients from spectroscopic observations with LRIS on the Keck I 10-m telescope. Targets were supplied by the ASAS-SN and PSH. All observations were made on 2018 May 10 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).
Name | IAU Name | RA (J2000) | Dec (J2000) | z | Type | Phase | Notes
ASASSN-18jl | AT2018bfc | 23:22:58.34 | -01:01:40.40 | 0.034 | Ia | -1 d | a
AT2018bek | AT2018bek | 15:32:01.55 | +68:14:31.00 | 0.022 | IIn | | b
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.
(a) We measure a velocity of -10,600 km/s for Si II 6355.
(b) The spectrum has a very blue continuum with multiple weak narrow and broad absorption and emission features. The narrow Balmer lines have a red wing and a sharp absorption to the blue. The minimum of the narrow absorption corresponds to a velocity of -400 km/s.
