SXT Status Report
                        25 September - 9 October 1995 
                            (Weeks 39 and 40)
                                ---------

                              James Lemen
                                9-Oct-95

This past two weeks have been fairly straightforward as we have been
between campaign.  SXT operations have been nearly error-free.  Many of
our Japanese colleagues were away last week attending the autumn
Astronomical Society of Japan (ASJ) meeting which was held in Niigata. 

The autumn weather in Sagamihara has been very pleasant the past two
weeks in the wake of the large typhoon which entered the Tokyo area a
couple of weeks ago.  But if it is not typhoons, it's seismic activity! 
The Izu peninsula has suffered a serious of minor-to-moderate earth-
quakes in the past two weeks.  No has been injured but there has been
some minor damage reported in the News.  The Izu peninsula is about 150
km south of ISAS. 


SOLAR ACTIVITY

The number of X-ray Bright Points that can be seen in Yohkoh has
increased in the past few months as the number of active regions
diminish.  The largest flare in the past couple of weeks was a B9.3. 
The SXT is on the lookout for new-cycle regions. 


SXT INSTRUMENT STATUS

The SXT instrument has worked well during the past two weeks.  As
Nariaki Nitta reported two weeks ago, we continue to use Al/Mg (with
DPE=17) as the quiet patrol image.  This was changed recently to improve
the performance of automatic active region selection (ARS 1).  This
change has been largely successful, although tracking is sometimes
fooled during the passages of the SAA (South Atlantic Anomaly). 


CALIBRATION STATUS

We are taking a series of terminator images in all filters to provide
calibration data since the most recent entrance filter failure. 
Although the added stray light will affect the analysis of very faint
features, the automatic subtraction technique is working well. 


PASS CONFLICTS

Due to conflicts with ASCA, we lost a total of 7 passes in Week 39, 
and 9 passes in Week 40.


CAMPAIGNS

There have been no campaigns during the past two weeks.  We expect
to return to the filament hunt this week.  

Next week we will conduct a campaign entitled "Chromospheric Activity
and Coronal Loops" which will involve observers from Pic du Midi.  It is
being coordinated with B. Schmieder, P. Mein, L. Roudier, L. Van Driel-
Gesztelyi.

Later this week the local eclipse observation planning committee will
meet to discuss the solar eclipse that will be observed during KSC
contact times on 24 October 1994.  Kevin Reardon has prepared an
ephemeris plot showing the four eclipse episodes which can be viewed at:
http://galileo.ifa.hawaii.edu/~kreardon/eclipse.html


SCIENCE

The few of us that did not attend the the ASJ meeting in Niigata
enjoyed various discussions with Ron Moore about filament eruption
scenarios.  Ron has found several good candidates to study and is
now running Yodat to access the full-frame and partial-frame data
for further investigation.

Hugh Hudson has finally finished the ``one month to submission'' paper
about the 13-Nov-94 eruptive event (only ten months late!).  As Ron
Moore's visit has made clear, this event - which we believe to be the
first one for which the CME structure can actually be observed during
its initial motions - can easily be interpreted in terms of the Hirayama
model of flux-rope eruption.  J. Lemen was mainly focused on learning how
to be an effective Chief Observer after a four-month absence, but also
worked with Ron Moore from time to time. 


SEMINARS

There were no seminars the past two weeks.

PERSONNEL

During week 39 Lawrence Shing and J. Lemen arrived at ISAS, and Hugh
Hudson returned from his travels in the U.S.  Lawrence quickly got to
work fixing up the MO disk mounting software and we can now mount the MO
disks from all the ISAS computers.  During week 40 Greg Slater and Sam
Freeland returned to California.  Before his departure, Sam Freeland
upgraded the Yohkoh software and rearranged some of the directories so
that the Yohkoh system will be compatible with the SOHO software trees. 
We are happy to announce that Serge Savy has recently joined the
Lockheed/SXT team as an ARC employee.  Serge did his post-graduate work
at MSSL, working with Prof Len Culhane, and has nearly finished his
Ph.D. thesis.  Serge will be resident at ISAS and is learning how to be
an SXT Chief Observer. 



Week 39 Tohban:
   SSOC: S.Yuda, S.Yashiro
   KSC:  H.Hara, S.Hashizume
SXT Chief Observer:
   J. Lemen
SXT Systems and Data Engineer:
   S. Freeland

Week 40 Tohban:
   SSOC: S.Yasuno, M.Sawa
   KSC:  H.Hara, H.Watanabe
SXT Chief Observer:
   J. Lemen, Serge Savy
SXT Systems and Data Engineer:
   L. Shing