Spectroscopic Classification of three optical transients with the Lick 3-m Shane Telescope
ATel #12453; Subhash Bose, Subo Dong (KIAA-PKU), T. G. Brink, A. V. Filippenko (UCB)
on 30 Jan 2019; 03:28 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Subo Dong (dongsubo@pku.edu.cn)
Subjects: Optical, Supernovae
We report optical spectroscopic observations of optical transients ASASSN-19aj/2019mh (ATel #12393), ATLAS19bdy/2019ro, and ATLAS19buo/2019zf using the Kast spectrograph mounted on the 3-m Shane telescope at Lick Observatory. The targets were discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014) and ATLAS survey (Tonry et al. 2011 and Tonry et al. ATel #8680), respectively. We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to identify the supernova types and phases from the spectra.
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Survey Name | IAU Name | UT Obs. Date | Spec. Type | Phase (peak brightness) | Redshift | Notes
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ASASSN-19aj | SN 2019mh | 2019-01-28.# | II | ---- | 0.018848 (NED) | (2)
ATLAS19bdy | SN 2019ro | 2019-01-28.# | Ia | near maximum +- 1 week | 0.043 | (1)
ATLAS19buo | AT 2019zf | 2019-01-28.# | CV | ---- | |
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(1) The spectrum matches with several Type Ia-91T.
(2) Halpha P-Cygni profile has a relatively shallow absorption part, similar to spectra of some fast declining SNe II (a.k.a., SNe IIL).
The SNID estimated redshift is consistent with that of the host galaxy. This sub-classification is consistent with the CCSN classification as was reported by S. J. Prentice et. al in TNS.
