Spectroscopic classification of the bright dwarf nova TCP J00590972+3438357
ATel #13348; Keisuke Isogai, Naoto Kojiguchi, Yusuke Tampo (Kyoto University), Hiroyuki Maehara (National Astronomical Observatory of Japan)
on 13 Dec 2019; 19:10 UT
Credential Certification: Keisuke Isogai (isogai@kusastro.kyoto-u.ac.jp)
Subjects: Optical, Binary, Cataclysmic Variable, Transient
We report on a spectrum of the bright optical transient TCP J00590972+3438357.
As reported to CBAT,
this object was discovered by Seiji Ueda at 12.4 mag on 2019-12-13.4309 UT. Moreover, Patrcik Schmeer reported that there is an SDSS counterpart (u=20.95, g=20.95, r=21.00, i=21.157, z=20.93) and a GALEX one (FUV=21.03, NUV=20.54).
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. The H alpha shows a weak emission in the core of broad absorption. These features suggest that this object is a dwarf nova in outburst.
We also performed time-series photometry in 2019-12-13.60--64 UT through thin clouds by using Kyoto University 40-cm telescope. However, there is no clear signal of superhumps. Thus, this object is likely to be a WZ Sge-type dwarf nova with a low inclination.
Spectrum of TCP J00590972+3438357