Classification certificate for object 2016blk
TNS Classification Report No. 189 [ 2016TNSCR.282....1P ]

Date Received (UTC): 2016-04-11 20:45:40
Sender: Jose Prieto
Group: None

J. L. Prieto, B. J. Shappee report/s a classification of object: SN 2016blk

Type: SN Ia
Redshift: 0.02997

Remarks: The spectrum shows characteristics of a (likely peculiar) Type Ia supernova. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin & Tonry 2007, ApJ, 666, 1024) and chi2-by-eye shows that the best matches are the spectra of SN2007if ("super-chandra") and SN2002ic (Ia-CSM) a few days after max, but there are also reasonably good matches with some SN1991T-like SNe. After correcting the spectrum for the redshift of the host galaxy (z=0.02997 from 6dF), we measure a Si II 635.5nm expansion velocity of ~12000 km/s.

The following Classification spectrum was provided:

Obsdate: 2016-04-09 23:20:43
Instrument: IMACS
Telescope: Walter Baade Magellan 6.5-m telescope (LCO)

Remarks: We obtained an optical spectrum (range 420-940nm; resolution ~5 Angstroms) of ASASSN-16dx/AT2016blk (ATel #8898, TNS) on UT 2016 Apr. 10.0 with IMACS mounted on the Magellan 6.5-m Baade telescope.

Details of the object and its spectra can be viewed here: https://wis-tns.weizmann.ac.il/object/2016blk