Classification certificate for object 2018ddr
TNS Classification Report No. 2273 [ 2018TNSCR.988....1K ]

Date Received (UTC): 2018-07-15 08:36:09
Sender: Jose Prieto
Group: ASAS-SN

L. Khlat (ENS-Lyon), J. L. Prieto (UDP), S. Dong (KIAA-PKU) report/s a classification of object: SN 2018ddr

Type: SN IIb
Redshift: 0.01468

Remarks: We obtained an optical low-resolution spectrum of supernovae candidates on UT 2018 July 15 with WFCCD mounted on the du Pont 2.5m telescope at Las Campanas Observatory. The spectrum of SN2018ddr is that of a Type IIb before maximum light. SNID (Blondin & Tonry 2007) gives a best fit age of -11.6 days before maximum light and z=0.019 as the redshift, consistent with the host galaxy redshift.

The following Classification spectrum was provided:

Obsdate: 2018-07-15 01:16:20
Instrument: WFCCD
Telescope: Las Campanas Observatory du Pont telescope

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