Classification certificate for object 2018gk
TNS Classification Report No. 1649 [ 2018TNSCR..81....1F ]

Date Received (UTC): 2018-01-17 00:37:22
Sender: Jose Prieto
Group: ASAS-SN

E. Falco, M. Calkins (Harvard CfA), J. L. Prieto (UDP/MAS), K. Z. Stanek (OSU) report/s a classification of object: SN 2018gk

Type: SN II

Remarks: We report optical spectroscopic observations of the ASAS-SN transients ASASSN-18am/AT2018gk, ASASN-18ao/AT2018gm, and ASASSN-18ap/AT2018gn (ATel #11178), obtained on UT 2018 Jan 14-16 with FAST (range 3600-7450 Angstroms) mounted on the F. L. Whipple Observatory 1.5-m telescope. We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to aid with the type, phase and redshift determination. ASASSN-18am has a blue continuum, relatively weak and broad H-alpha (FWHM ~ 5000 km/s), and strong He II in emission (narrow and broad features), consistent with a young Type II SN.

The following Classification spectrum was provided:

Obsdate: 2018-01-14 12:53:02
Instrument: FAST
Telescope: FLWO 1.5m Tillinghast

Details of the object and its spectra can be viewed here: https://wis-tns.weizmann.ac.il/object/2018gk