DRAFT
2021-03-21 06:31:55
Type: Object/s-Discovery/Classification
Bibcode: 2021TNSAN..94....1A
ZTF21aapkbav/AT2021gca: Gemini-N spectroscopy
Authors: Tomas Ahumada (UMD), Christoffer Fremling (Caltech), Igor Andreoni (Caltech), Leo Singer (NASA/GSFC)
Source Group: ZTF
Keywords: Supernova, Optical, Transient, Spectroscopy
Abstract:
We observed the fast optical transient ZTF21aapkbav/AT2021gca (Andreoni et al., AstroNote 2021-89; Chen et al., AstroNote 2021-92) with the Gemini North telescope equipped with the GMOS instrument (program ID GN-2021A-Q-102, PI Ahumada). The spectrum shows a broad H-alpha feature extending to v~9,000 km/s and possibly He I 5876. The redshift is coarsely measured and consistent with z=0.036 (Kochanek et al., 2012), as tabulated by NED. We therefore conclude that ZTF21aapkbav is a supernova of Type II.

We observed the fast optical transient ZTF21aapkbav/AT2021gca (Andreoni et al., AstroNote 2021-89; Chen et al., AstroNote 2021-92) with the Gemini North telescope equipped with the GMOS instrument (program ID GN-2021A-Q-102, PI Ahumada). The observations started on 2021-03-20 13:10:08 UT. Data were reduced using the Gemini IRAF package.

The spectrum shows a broad H-alpha feature extending to v~9,000 km/s and possibly He I 5876. The redshift is coarsely measured and consistent with z=0.036 (Kochanek et al., 2012), as tabulated by NED.

We therefore conclude that ZTF21aapkbav is a supernova of Type II.

 

We thank Gemini staff for making these observations possible.

Show current TNS values
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 2021gca [ZTF21aapkbav] 14:28:07.332 +33:29:49.38 14:28:07.331 +33:29:49.39 SN IIb 0.036
AstroNote Publication Timestamp Title Authors
2021-89 2021-03-20 04:05:39 ZTF21aapkbav/AT2021gca: ZTF discovery of an intrinsically faint fast transient Igor Andreoni (Caltech), Michael Coughlin (UMN), Erik Kool (OKC), Tomas Ahumada (UMD), David Cook (IPAC), Mansi Kasliwal (Caltech), Shreya Anand (Caltech), Ana Sagues Carracedo (OKC), Leo Singer (NASA/GSFC)
2021-92 2021-03-20 17:31:06 Kinder follow-up observations of AT 2021gca (ZTF21aapkbav) T.-W. Chen, S. Yang (Stockholm), Y.-C. Pan, C.-C. Ngeow, H.-Y. Hsiao, C.-S. Lin, W.-J. Hou and J.-K. Guo (IANCU).

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