Spectroscopic Classifications of Optical Transients with the Lick Shane telescope

ATel #14153; D. O. Jones, G. Dimitriadis, R. J. Foley (UCSC)
on 5 Nov 2020; 22:11 UT
Distributed as an Instant Email Notice Transients
Credential Certification: David Jones (david.jones@ucsc.edu)

Tweet

We report the following classifications of optical transients from spectroscopic observations with the Kast spectrograph on the Shane telescope. Targets were supplied by PSST. All observations were made on 2020 Nov 5 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name         | IAU Name  | RA (J2000)  | Dec (J2000)  |   z   | Type  | Phase  | Notes
 
PS20kvb      | AT2020yxd | 02:09:13.67 | +33:02:38.09 | 0.05  |  Ia   |  -10 d | (1) 
ZTF18aadsuxd | AT2020yui | 08:38:08.15 | +31:40:04.51 | 0.031 |       |        | (2) 

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) The best-fit SNID redshift is 0.04 with a phase of ~0 d, however, given the increase in flux in the last few days we think it is more likely the SN is quite young and at a higher redshift of 0.05. (2) Spectrum is blue and featureless except for narrow emission lines likely from the host galaxy. Because of the brightness of the host galaxy, it is unclear how much flux in the spectrum comes from the transient.