ASCA Slew Data Analysis

K. Ebisawa$^1$, E. Pier$^2$, R. Fujimoto$^3$ and Y. Ueda$^3$

$^1$code 662, NASA/GSFC, USRA, Greenbelt, MD, USA\newline
$^1$code 631, NASA/GSFC, RITSS, Greenbelt, MD, USA\newline
$^3$ISAS, Sagamihara, Kanagawa, Japan



Throughout its 7 year lifetime, the ASCA satellite 
performed more than 3,000 attitude maneuver operations.
The ASCA Gas Imaging Spectrometer (GIS) had a large
field of view and fine time-resolutions, which enable
one to analyze the X-ray events detected during the
attitude maneuvers.  We have accumulated all the
GIS data during the attitude maneuvers, which is more than
400 ksec and covers at least one-third of the total sky.  We have been
working to improve the attitude determination accuracy
and developing an algorithm to detect sources and determine their
accurate X-ray fluxes.  
We expect to achieve  the sensitivity $\sim$ 1 mCrab and
source position accuracy $\sim$  0.05 degree.
Many serendipitous sources are expected to be discovered.