Classification certificate for object 2017yi
TNS Classification Report No. 760 [ 2017TNSCR.143....1R ]

Date Received (UTC): 2017-02-02 06:33:38
Sender: Dr. Liming Rui
Group: None

Liming Rui, Xiaofeng Wang, Danfeng Xiang, Wenxiong Li (THU), Junjun Jia,Min He, Tianmeng Zhang (NAOC), Jujia Zhang(YNAO) report/s a classification of object: SN 2017yi

Type: SN Ia
Redshift: 0.034

The following Classification spectrum was provided:

Obsdate: 2017-02-01 10:43:58
Instrument: Cassegrain
Telescope: 2.16m Beijing Astronomical Observatory Telescope

Remarks: A spectrum taken on Feb. 02.94 2017 with the Xinglong 2.16-m telescope of NAOC,the "Supernova Identification" code (SNID; Blondin and Tonry 2007, ApJ, 666, 1024) shows that it matches with SN 2003du at t = -9 days from the maximum light.

Details of the object and its spectra can be viewed here: https://wis-tns.weizmann.ac.il/object/2017yi