AstroNote 2022-11

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DRAFT
2022-01-11 07:48:06
Type: Object/s-Discovery/Classification
Asiago spectroscopic classification of optical transient
Authors: L. Tomasella, S. Benetti, E. Cappellaro (INAF OAPd)
Source Group: Padova-Asiago
Abstract:
We report the spectroscopic classification of AT2022ic, AT2022ih, AT2022im, AT2022io

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of AT2022ic, AT2022ih, AT2022im, AT2022io. These transients were reported by ATLAS.

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

AT2022ic (ATLAS22bfn) is a Galactic transient (CV). The spectrum shows the absorption features of the Balmer series, at rest wavelength, over a blue continuum. 

AT2022ih  (ATLAS22bft) is a Type Ia SN about one week before maximum. The redshift z~0.069 is derived from SNID/GELATO SN template fitting and confirmed meauring the position of the host galaxy narrow Halpha emission.

AT2022im (ATLAS22bfz) in WISEA J075459.88+424610.5 (at z=0.067683 from SDSS 2016 via NED) is consistent with a SN Ia 91T-like. 

AT2022io (ATLAS22bgb) in WISEA J082439.97+544008.1 (at z=0.063219 from SDSS 2016 via NED) is a Type Ia SN aroun one week after maximum.

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
TNS2022ic [ATLAS22bfn]04:11:12.891+82:13:45.47CV004:11:12.920+82:13:45.48CV
TNS2022ih [ATLAS22bft]03:22:28.304+38:26:16.75SN Ia0.06903:22:28.320+38:26:16.51SN Ia0.069
TNS2022im [ATLAS22bfz]07:55:00.141+42:46:10.34SN Ia-91T-like0.06768307:55:00.121+42:46:10.25SN Ia-91T-like0.067683
TNS2022io [ATLAS22bgb]08:24:38.400+54:40:26.16SN Ia0.06321908:24:38.413+54:40:26.27SN Ia0.063219