Weekly Notes from the Yohkoh Soft
X-Ray Telescope (Week 45)
07-Nov-97 06:00 UT
Instrument Status
The Soft X-ray Telescope remains in fine working order.
This week saw a marked increase in activity, with region
AR8100 growing and flaring.
This region raised the X-ray background from B to mid-C level,
and produced numerous M flares, and even two large X flares.
A more detailed report of this week's activities is
available here.
Observation of the Week
The big event this week was the tremendous activity from region AR8100.
As seen in the graph below, which shows the X-ray level over
the last several days, this energetic region raised the background level
from the low-B to the mid-C level, and produced many large flares.
(Click on the graph to see a larger, more visible, version.)
The largest flare is the one seen at 11:55 UT on 06-Nov. This very
sharp impulsive flare was well observed by SXT; a movie of
full Sun images around the time of the flares
is viewable at URL:
ftp://isass0.solar.isas.ac.jp/pub/sxt_co/x9_nov06_ffi.mpg
Analysis of SXT and HXT images, light curves, and temperature maps
is now ongoing.
D. McKenzie 07-Nov-97 (email mckenzie@isass0.solar.isas.ac.jp)