Classification certificate for object 2017dzs
TNS Classification Report No. 1007 [ 2017TNSCR.596....1K ]

Date Received (UTC): 2017-05-25 10:33:43
Sender: Dr. Miho Kawabata
Group: None

Miho Kawabata report/s a classification of object: SN 2017dzs

Type: SN Ia-91bg-like
Redshift: 0.0173

The following Classification spectrum was provided:

Obsdate: 2017-05-13 19:12:00
Instrument: HOWPol
Telescope: KANATA 1.5-m Optical and Near-Infrared telescope

Remarks: The spectrum was consistent with a subluminous Type Ia supernova at a few weeks after the maximum date, showing remarkable absorption lines of SiII 5972 and 6355, whose line velocities reached about 9,500 km/s. The ratio of the absorption depths of SiII 5972 to SiII 6355 was roughly 0.5, indicating that this SN could be a SN 1991bg-like SN. The CaII IR triplet was also seen.

Details of the object and its spectra can be viewed here: