We report observations of a stellar occultation by the classical Kuiper Belt object (50000) Quaoar that occurred on 2019 June 28. A single-chord high-cadence (2 Hz) photometry data set was obtained with the Tomo-e Gozen CMOS camera mounted on the ...
Takahashi, J.   Itoh, Y.   Watanabe, M.   Akitaya, H.   Takaki, K.   Kawabata, K.S.   Itoh, R.   Oasa, Y.   
Publications of the Astronomical Society of Japan 71(2) 2019年 [査読有り]
We present the results of imaging polarimetry of the eclipsed Moon on 2014 October 8. The observed polarization degree was less than 1% in both the V and R bands, which contrasts with the reported 2%-3% polarization during the eclipse of 2015 Apri...
We present the results of the spectroscopic monitoring of the FU Orionis type star V960 Mon. Spectroscopic variations of an FU Orionis type star will provide valuable information of its physical nature and the mechanism of the outburst. We conduct...
Takarada, T.   Sato, B.   Omiya, M.   Harakawa, H.   Nagasawa, M.   Izumiura, H.   Kambe, E.   Takeda, Y.   Yoshida, M.   Itoh, Y.   Ando, H.   Kokubo, E.   Ida, S.   
Publications of the Astronomical Society of Japan 70(4) 2018年 [査読有り]
We report the detection of planets around two evolved giant stars from radial velocity measurements at Okayama Astrophysical observatory. 24 Boo (G3 IV) has a mass of 0.99 M-circle dot, a radius of 10.64 R-circle dot, and a metallicity of [Fe/H] =...