Spectroscopic classification of transients with the Lick Shane telescope

ATel #15221; K. W. Davis, J. Johnson, S. Tinyanont, R. J. Foley (UCSC), W. V. Jacobson-Galán (UCB), L. DeMarchi (Northwestern), L. Izzo (DARK/NBI)
on 11 Feb 2022; 00:00 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

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We report the following classifications from spectroscopic observations with the KAST spectrograph on the Shane telescope obtained on 2022 February 6 UT. The targets were supplied by ATLAS. The classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name       | IAU Name  | RA (J2000)   | Dec (J2000)  |   z    | Type | Phase | Notes
 
ATLAS22cle | AT2022afc | 07:56:45.028 | +26:53:07.36 | 0.028  |  Ib  |  +5d  |  
ATLAS22cyp | AT2022ann | 10:17:29.617 | -02:25:35.27 | 0.049  |  Icn |       | (1) 
ATLAS22dpr | AT2022atr | 14:51:57.832 | +29:55:20.83 |   0    |  CV  |       | (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 spectrum has a blue continuum with superimposed C II and potentially C III P-Cygni features, similar to SN2019hgp (Gal-Yam et al., 2022, Nature, 601, 201). We measure a C II 6580 velocity of -670 km/s. Assuming z = 0.049 from the SN spectrum, the apparent host galaxy is low luminosity with M = -14.7 mag. (2) Blue continuum with weak H-alpha absorption at z = 0.