Spectroscopy of the WZ Sge-type dwarf nova EQ Lyn (=SDSS J074531.92+453829.6)
ATel #13161; Keisuke Isogai, Miho Kawabata (Kyoto University, Okayama Obsevatory), Umut Burgaz (Kyoto University, Ege University), Keiichi Maeda (Kyoto University), Hiroyuki Maehara (National Astronomical Observatory of Japan)
on 3 Oct 2019; 04:43 UT
Credential Certification: Keisuke Isogai (isogai@kusastro.kyoto-u.ac.jp)
Subjects: Optical, Cataclysmic Variable, Transient
We report on a low-resolution spectrum of the WZ Sge-type dwarf nova EQ Lyn during the outburst.
As reported in vsnet-alert 23591, the outburst was discovered by T. Kojima, and then it was confirmed that the outburst has lasted from Sep. 26 by ASAS-SN Sky patrol (Shappee et al. 2014, Kochanek et al. 2017)).
We obtained a spectroscopic snapshot on 2019-09-30.79 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 dominated by Balmer and He I absorption lines while there are no definite signals of He II. Although WZ Sge-type dwarf novae often show Balmer emission lines in the early stage of the outbursts, this object shows a weak emission in the core of the H-alpha absorption line. It may be caused by its low inclination.
