Spectroscopic confirmation of ASASSN-19ady as a dwarf nova
ATel #13374; Keisuke Isogai (Kyoto University, Okayama Observatory), Hiroyuki Maehara (National Astronomical Observatory of Japan)
on 27 Dec 2019; 17:44 UT
Credential Certification: Keisuke Isogai (isogai@kusastro.kyoto-u.ac.jp)
Subjects: Optical, Cataclysmic Variable, Transient, Variables
We report on a spectrum of the bright optical transient ASASSN-19ady.
This object was discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al. 2014) at g=14.7 mag on 2019-12-26.27 UT. We obtained a low-resolution spectrum on 2019-12-13.62 UT by using a fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. 2019) mounted on the 3.8-m telescope Seimei at Okayama Observatory of Kyoto University.
The spectrum shows a blue continuum with Balmer and He I absorption lines. In comparison with other Balmer lines, H alpha absorption is shallow. It may be filled by the emission line.
Spectrum of ASASSN-19ady
