  The detection of a massive jet-ejection event from SS433 with RXTE is
reported. SS433 in its high state has been monitored with RXTE from 2001/11/09
(MJD = 52222) to 2001/11/25 (MJD = 52238), following a radio flare on
2001/11/02 (MJD = 52215). An irregular temporal variation with time scales of
100-1000 s appears in the light curve, and the amplitude increases day by day.
This is the first detection of such a fast variation from the source. In
addition to the fast variations, the daily light curve scatters with a time
scale of ~day from 2001/11/17 (MJD = 52230). Following the scatter, another
radio flare has been detected on 2001/11/22 (MJD = 52235), which has been
obviously formed during the X-ray scatter. This is a preliminary report on a
massive jet-ejection event witnessed in X-ray band for the first time.
