Spectroscopic classification of three supernovae candidates

ATel #10669; Subhash Bose, Subo Dong, Fengwu Sun (KIAA-PKU), Jose L. Prieto (UDP), K. Z. Stanek (OSU)
on 24 Aug 2017; 17:50 UT
Credential Certification: Subhash Bose (bose@pku.edu.cn)

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We report optical spectroscopic observation of supernova candidates ASASSN-17kr (2017gas), ASASSN-17kz (2017gea) and Gaia17bzv (2017fzy) done on UT 2017-08-18, with DBSP mounted on the Hale 5m telescope at Palomar Observatory. Targets were discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN, Shappee et al. 2014) and Gaia Alerts (http://gsaweb.ast.cam.ac.uk/alerts/alertsindex). We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to identify the type and phase of the SN spectra.

 
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 Survey Name | IAU Name   | Obsv. Date    | Spec. Type | Phase (w.r.t max) |  Redshift    | Notes  
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 ASASSN-17kr | SN 2017gas | 2017-08-18.35 |    IIn     |      ---          |  0.010       |  (1)   
 ASASSN-17kz | SN 2017gea | 2017-08-18.46 |    Ia      | -4 to -9 days     |  0.032 (NED) |  (2)  
 Gaia17bzv   | SN 2017fzy | 2017-08-18.48 |    Ia      | +5 to 8 days      |  0.014 (NED) |  (3)  
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(1) The narrow emission lines in the spectrum are consistent with SNe IIn at a redshift of 0.010.
(2) The age of the SN is about a week before the maximum. The SNID estimated redshift is consistent with the redshift of the host KUG 0241+338.
(3) The age of the SN is about a week after the maximum. The SNID estimated redshift is consistent with the redshift of the host IC 0413.

This research uses data obtained through the Telescope Access Program (TAP), which has been funded by the National Astronomical Observatories of China, the Chinese Academy of Sciences, and the Special Fund for Astronomy from the Ministry of Finance. Observations obtained with the Hale Telescope at Palomar Observatory were obtained as part of an agreement between the National Astronomical Observatories, Chinese Academy of Sciences, and the California Institute of Technology.