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.
| 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 | 2022ic [ATLAS22bfn] | 04:11:12.891 | +82:13:45.47 | CV | 0 | 04:11:12.920 | +82:13:45.48 | CV | ||||
| TNS | 2022ih [ATLAS22bft] | 03:22:28.304 | +38:26:16.75 | SN Ia | 0.069 | 03:22:28.320 | +38:26:16.51 | SN Ia | 0.069 | |||
| TNS | 2022im [ATLAS22bfz] | 07:55:00.141 | +42:46:10.34 | SN Ia-91T-like | 0.067683 | 07:55:00.121 | +42:46:10.25 | SN Ia-91T-like | 0.067683 | |||
| TNS | 2022io [ATLAS22bgb] | 08:24:38.400 | +54:40:26.16 | SN Ia | 0.063219 | 08:24:38.413 | +54:40:26.27 | SN Ia | 0.063219 |
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