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Follow-up Spectroscopy of U Scorpii by the Kyoto-U Seimei Telescope

ATel #15420; Kenta Taguchi, Masayuki Yamanaka, Keisuke Isogai (Kyoto University)
on 7 Jun 2022; 16:24 UT
Credential Certification: Keisuke Isogai (isogai@kusastro.kyoto-u.ac.jp)

Subjects: Optical, Cataclysmic Variable, Nova, Transient

Referred to by ATel #: 15422, 15423, 15436, 15502, 15508, 15513

We performed a follow-up observation of the 2022 outburst of the recurrent nova U Sco discovered by Masayuki Moriyama (vsnet-alert 26798, ATel #15417). We obtained a low-resolution spectrum (R ∼ 500, the wavelength coverage is 4100 -- 8500 Å) from 2022-06-07.4751 UT to 2022-06-07.4802 UT using the fiber-fed integral field spectrograph (KOOLS-IFU; Matsubayashi et al. 2019) mounted on the 3.8 m Seimei telescope (Kurita et al. 2020) at Okayama Observatory of Kyoto University.

The Hα emission profile has three peaks around 6503, 6556, and 6634 Å, among which the central one is the brightest. The Hβ emission profile also has three peaks, among which the central and the redder ones are brighter than the bluer one. These profiles are in good agreement with those shown in Figure 2 of Yamanaka et al. (2010). Follow-up observations are encouraged.