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.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2021hpr | 10:16:38.641 | +73:24:02.02 | SN I | 0.009346 | NGC3147 | 10:16:38.620 | +73:24:01.80 | SN Ia | 0.009346 |
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