459 citations · 1.5k across the 18 of their papers we have counts for
18 papers
Reverberation Measurements of the Inner Radii of the Dust Tori in Quasars
Takeo Minezaki, Yuzuru Yoshii, Yukiyasu Kobayashi +8
We present the results of a dust-reverberation survey of quasars at redshifts z<0.6. We found a delayed response of the K-band flux variation after the optical flux variation in 25…
Calibration of AGN Reverberation Distance Measurements
Shintaro Koshida, Yuzuru Yoshii, Yukiyasu Kobayashi +6
In Yoshii et al. (2014), we described a new method for measuring extragalactic distances based on dust reverberation in active galactic nuclei (AGNs), and we validated our new meth…
Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
S. Koshida, T. Minezaki, Y. Yoshii +8
We present the results of a dust reverberation survey for 17 nearby Seyfert 1 galaxies, which provides the largest homogeneous data collection for the radius of the innermost dust…
Long-Term Optical Continuum Color Variability of Nearby Active Galactic Nuclei
Yu Sakata, Takeo Minezaki, Yuzuru Yoshii +8
We examine whether the spectral energy distribution of optical continuum emission of active galactic nuclei (AGNs) changes during flux variation, based on accurate and frequent mon…
Variation of Inner Radius of Dust Torus in NGC4151
Shintaro Koshida, Yuzuru Yoshii, Yukiyasu Kobayashi +8
The long-term optical and near infrared monitoring observations for a type 1 act ive galactic nucleus NGC 4151 were carried out for six years from 2001 to 2006 b y using the MAGNUM…
The Infrared Cloud Monitor for the MAGNUM Robotic Telescope at Haleakala
M. Suganuma, Y. Kobayashi, N. Okada +6
We present the most successful infrared cloud monitor for a robotic telescope. This system was originally developed for the MAGNUM 2-m telescope, which has been achieving unmanned…