Spectroscopic Classification of AT 2021hiz with SOAR

ATel #14500; G. Dimitriadis, M. R. Siebert, C. Rojas-Bravo, R. J. Foley (UC Santa Cruz)
on 31 Mar 2021; 21:49 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Ryan Foley (foley@ucsc.edu)

Tweet

We report the classification of AT 2020hiz from spectroscopic observations with the Goodman spectrograph on the Southern Astrophysical Research (SOAR) telescope, made on 2021 Mar 31 UT. The target was supplied by ALeRCE using the ZTF data stream. The classification was performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024).

 
Name           | IAU Name  |  RA (J2000)  | Dec (J2000)  |    z   | Type   |  Phase   | Notes
 
ZTF21aaqytjr   | AT2021hiz | 12:25:41.675 | +07:13:42.26 | 0.0033 |  Ia    |   -15d   | (1) 
 

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 -15,400 km/s and C II velocity of -13,450 km/s. Assuming a distance modulus of 32.07 mag for the host galaxy, IC 3322A (et al., 2013, AJ, 146, 86), Milky Way extinction, and no host extinction, the SN was discovered at M_g ~ -14.4 mag. Young Supernova Experiment observations indicate it rose by 1.2 mag in the g band in the day since discovery. All observations are consistent with a very young Type Ia supernova.

We thank the SOAR staff, and in particular Cesar Briceno, for their help with this target-of-opportunity observation.