Spectroscopic classification of ASASSN-19ado = AT 2019xim
ATel #13371; Hiroyuki Maehara (National Astronomical Observatory of Japan)
on 24 Dec 2019; 18:19 UT
Credential Certification: Hiroyuki Maehara (hiroyuki.maehara@nao.ac.jp)
Subjects: Optical, Cataclysmic Variable, Transient, Variables
We report the spectroscopic observation of ASASSN-19ado (= AT 2019xim)
discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014
and Kochanek et al. 2017)
at g'=13.9 mag on 2019-12-22.200 UT.
We obtained a a low-resolution spectrum (range 4000-8500 Å) of this object on 2019-12-24.53 UT
by using the fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. 2019) mounted on the 3.8-m Seimei telescope at Okayama Observatory, Kyoto University.
The spectrum shows a blue continuum with Balmer, He I, He II (4686 Å), and C III/N III emission lines.
H-beta and H-gamma emission lines are superposed on the broad absorption lines.
These features suggest that the object is a WZ Sge-type dwarf nova in outburst.
