AstroNote 2021-107

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2021-04-03 12:34:43
Type: Object/s-Discovery/Classification
Asiago spectroscopic observation of SN 2021hpr
Authors: L. Tomasella, S. Benetti, E. Cappellaro, A. Pastorello (INAF OAPd)
Source Group: Padova-Asiago
We report the spectroscopic classification of SN 2021hpr in NGC 3147 (z=0.009346)

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of AT2021hpr (discovery report in TNS supplied by K. Itagaki).

The observation was  obtained with the Asiago 1.82m Copernico Telescope (+ AFOSC; range 340-820 nm; resolution 1.4 nm).

The spectrum shows several broad features reminiscent of the early spectra of Ic-BL supernovae.A broad absorption centred at about 591.0 nm (rest frame) can be identified  with SiII 635.5 nm and then an expansion velocity of about 21000 km/s can be estimated. However, this feature appears much stronger that in typical Ic spectrum and more consistent with the SiII feature in SN Ia. At this stage, the classification remain uncertain.

The classification was performed using the GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024) tools.



Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021hpr10:16:38.641+73:24:02.02SN I0.009346NGC314710:16:38.616+73:24:01.81SN Ia0.009346