TNS Classification Report No. 14371 [ 2023TNSCR.269....1P ]

Date Received (UTC): 2023-02-02 21:07:50
Sender: Ismael Perez-Fournon
Group: SGLF

I. Pérez-Fournon, F. Poidevin (IAC & ULL), Z. Delgado-González (ULL), S. Geier (GRANTECAN & IAC), C. Jiménez Angel (IAC & ULL), R. Könyves-Tóth (Konkoly Observatory, Univ. of Szeged), R. Marques-Chaves (Univ. of Geneva), C. M. B. Omand (The Oskar Klein Centre), and R. Shirley (Univ. of Southampton) on behalf of the SGLF SLSN group report/s a classification of object: SN 2022actd

Type: SLSN-II
Redshift: 0.316

Remarks: AT 2022actd (ZTF22abxsghc, ATLAS22bnwt) was selected for LT SPRAT spectroscopy as a SLSN candidate using the ZTF public alerts, ATLAS forced photometry, the ALeRCE light curve classification, and our SGLF ZTF database and filters. It was also reported as a SLSN candidate by Chen et al. (AstroNote 2022-265). The classification and redshift were determined from our LT SPRAT spectrum using SNID (S. Blondin & J. L. Tonry 2007, ApJ, 666, 1024), with matches to type II SLSNe at z = 0.316. The host galaxy is a red galaxy with DESI Legacy Imaging Surveys DR10 magnitudes g=20.54, r=19.58, i=19.17, z=18.85. The reported redshift is based on the SN Hbeta emission line. ZTF light curve: https://lasair-ztf.lsst.ac.uk/object/ZTF22abxsghc/ https://alerce.online/object/ZTF22abxsghc https://antares.noirlab.edu/loci/ANT20220rrye746hlit DESI imaging finding chart: https://www.legacysurvey.org/viewer?ra=143.5312019&dec=9.6182561&zoom=16&layer=ls-dr10&mark=143.5312019,9.6182561

The following Classification spectrum was provided:

Obsdate: 2023-01-28 03:01:20
Instrument: SPRAT
Telescope: Liverpool Telescope

Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2022actd