Large X-ray variability in the dwarf Seyfert nucleus of NGC4395

K. Iwasawa$^1$, A.C. Fabian$^1$, P. Lira$^2$, O. Almaini$^3$ and A. Lawrence$^3$

$^1$Institute of Astronomy, University of Cambridge, UK\newline
$^2$Department of Physics and Astronomy, University of Leicester, UK\newline
$^3$Institute for Astronomy, University of Edinburgh, UK

We present ASCA observations of the nearby dwarf Seyfert galaxy NGC4395. 
This object resembles normal Seyfert galaxies in many respects
apart from its low luminosity. The X-ray
emission with a X-ray luminosity of the order of $10^{39}$erg s$^{-1}$ 
is highly variable unlike the other low luminosity active galaxies.
The 1--2 keV band emission is found to be most variable, probably due
to a warm absorber responding to the continuum. The X-ray variability 
observed in the ASCA observatiosn is discussed in
conjunction with the small balck hole mass estimated in this galaxy.