Classification certificate for object 2018ddx
TNS Classification Report No. 2266 [ 2018TNSCR.980....1K ]

Date Received (UTC): 2018-07-14 10:21:59
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 2018ddx

Type: SN II
Redshift: 0.0229

Remarks: We obtained an optical low-resolution spectrum of supernovae candidates on UT 2018 July 14 with WFCCD mounted on the du Pont 2.5m telescope at Las Campanas Observatory. The spectrum of ASASSN-18om/AT2018ddx is that of a Type II supernova before maximum light, showing a blue continuum and broad/weak H-alpha in emission. SNID gives a best fit subtype SN IIb with an age of -7.4 days before maximum light and z=0.027 as the redshift. The redshift of the host galaxy is 0.0229 measured from the narrow H-alpha emission from the host.

The following Classification spectrum was provided:

Obsdate: 2018-07-14 06:56:45
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/2018ddx