Classification certificate for object 2019avv
TNS Classification Report No. 4484 [ 2019TNSCR1186....1P ]

Date Received (UTC): 2019-07-10 17:00:00
Sender: Dr. Daniel Perley
Group: ZTF

Daniel Perley (LJMU), Lin Yan (Caltech), Ragnhild Lunnan (Stockholm), Avishay Gal-Yam, Steve Schulze, Ofer Yaron (Weizmann) report/s a classification of object: SN 2019avv

Type: SLSN-II
Redshift: 0.2207

The following Classification spectrum was provided:

Obsdate: 2019-07-02 09:52:32
Instrument: LRIS
Telescope: Keck I 10m

Remarks: Spectrum shows strong intermediate-width H-alpha in emission and no other features. Earlier spectra with DBSP close to peak light showed only a blue continuum, suggesting a possible alternative classification as a SLSN-I with late H-alpha emission (e.g. Yan et al. 2017, ApJ 848, 6).

Details of the object and its spectra can be viewed here: https://wis-tns.weizmann.ac.il/object/2019avv