Classification certificate for object 2017bos
TNS Classification Report No. 825 [ 2017TNSCR.270....1P ]

Date Received (UTC): 2017-03-03 13:01:52
Sender: Jose Prieto
Group: ASAS-SN

J. L. Prieto, E. Falco report/s a classification of object: SN 2017bos

Type: SN Ia

Remarks: We obtained an optical spectrum of ASASSN-17df/AT2017bos on UT 2017 Mar 2.2 with FAST mounted on the FLWO 1.5m telescope. The spectrum shows features consistent with a Type Ia SN around maximum light on top of strong host galaxy contamination. We measure Si II 6355 Angs. expansion velocity of 9800 km/s from the minimum of the P-Cygni absorption trough.

The following Classification spectrum was provided:

Obsdate: 2017-03-02 05:27:13
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/2017bos