69 citations · 191 across the 5 of their papers we have counts for
10 papers
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…
Multiple Regression Analysis of the Variable Component in the Near-Infrared Region for Type 1 AGN MCG+08-11-011
Hiroyuki Tomita, Yuzuru Yoshii, Yukiyasu Kobayashi +6
We propose a new method of analysing a variable component for type 1 active galactic nuclei (AGNs) in the near-infrared wavelength region. This analysis uses a multiple regression…
First Detection of Near-Infrared Intraday Variations in the Seyfert 1 Nucleus NGC4395
T. Minezaki, Y. Yoshii, Y. Kobayashi +6
We carried out a one-night optical V and near-infrared JHK monitoring observation of the least luminous Seyfert 1 galaxy, NGC4395, on 2004 May 1, and detected for the first time th…
The Optical/Near-Infrared Light Curves of SN 2002ap for the First 1.5 Years after Discovery
Hiroyuki Tomita, Jinsong Deng, Keiichi Maeda +9
Late-time BVRIJHK photometry of the peculiar Type Ic SN 2002ap, taken between 2002 June 12 and 2003 August 29 with the MAGNUM telescope, is presented. The light curve decline rate…
Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
M. Suganuma, Y. Yoshii, Y. Kobayashi +6
The most intense monitoring observations yet made in the optical (UBV) and near-infrared (JHK) wave bands were carried out for nearby Seyfert1 galaxies of NGC 5548, NGC 4051, NGC 3…