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Spectroscopic classification of SN 2019pfb as a young Type Ib supernova

ATel #13079; G. Terreran, W. Fong, R. Margutti, A. Miller, K. Alexander, P. Blanchard, D. Coppejans, K. Paterson (Northwestern University)
on 5 Sep 2019; 02:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Giacomo Terreran (giacomo.terreran@northwestern.edu)

Subjects: Supernovae

We report the spectroscopic classification of SN 2019pfb, discovered by the Zwicky Transient Facility (Kulkarni 2018; ATel #11266)

The observation was performed with Low Resolution Imaging Spectrometer (LRIS) mounted on the 10-m Keck I telescope (range 3200-10200 nm; resolution 0.7 nm).

 
 
Survey Name   |  IAU Name   |   Discovery MJD  | Discovery mag |    z    |  Type  |       Phase       | Notes 
ZTF19abvdgqo  | SN 2019pfb  |    58727.32      |    19.06      | 0.03683 |   Ib   | 1 week before max | (1)    

(1) The spectrum is consistent with that of a Type Ib SN. We find the best match to be with SN 2004gq one week before maximum light. The expansion velocity deduced from the He I 587.6 nm absorption is about 14000 km/s.

The classification was done with GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and Tonry 2007, ApJ, 666, 1024).