YITP WORKSHOP ON
Quasi-Periodic Oscillations and Time Variabilities of Accretion Flows
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ABSTRACT

NAME
INSTITUTE
TITLE OF THE TALK
T. Minezaki
University of Tokyo, Japan
Near-Infrared Intraday Variations in the Seyfert 1 Nucleus NGC 4395
We carried out a one-night optical V and near-infrared JHK monitoring observation of the least luminous Seyfert 1 galaxy, NGC 4395, on 2004 May 1, and detected for the first time the intraday flux variations in the J and H bands, while such variation was not clearly seen for the K band. The detected J and H variations are synchronized with the flux variation in the V band, which indicates that the intraday-variable component of near-infrared continuum emission of the NGC 4395 nucleus is an extension of power-law continuum emission to the near-infrared and originates in an outer region of the central accretion disk.


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