CHIEF OBSERVER'S REPORT for Week 29 16-Jul-01 through 22-Jul-01

A. Takeda

GENERAL

The solar activity was moderate during the week. Major flares were brought by ARs 9537 and 9539; each produced an M-class flare. Unfortunately, their observations with Yohkoh were blocked by S/C nights and SAA passages.

SXT TECHNICAL

No new problem to report. SXT normal pointing was updated on 21-Jul., at pass number 010721-0619.

SXT SCIENTIFIC For Web material see the science nuggets: Current Week: http://isass1.solar.isas.ac.jp/sxt_co/010720.html Index: http://isass1.solar.isas.ac.jp/sxt_co/index.html In this week's Nugget, a team of image providers (Bastian, McKenzie, and Nitta) fed a ghost writer (Hudson) with non-coronagraphic images of 3-part structure in CMEs. There seems to be something fundamental in this morphology.

CAMPAIGNS

Through the week, we cooperated with the CDS (VelAR) campaign to study Inter-Connecting Loops between active regions. An active-region pair, 9537/9539 was our main target, for which there were some good ICLs. These regions caused eruptions a few times. We also supported JOP 100 for two runs scheduled on the 17th and 19th.

For SXT plans, see: http://isass1.solar.isas.ac.jp/sxt_co/sxt_future.html

For SXT completed campaigns, see: http://isass1.solar.isas.ac.jp/sxt_co/sxt_catalog.html

PERSONNEL

Hudson arrived.

SEMINARS

There was no seminar this week.

SXT TABLE PLAN, WEEK 30 (23-Jul-01 through 29-Jul-01)

The last run of the JOP 100 campaign is scheduled on Monday. No other campaign is planned for this week. There will be two table uploads on Tuesday afternoon.

We plan to carry out a one-day bakeout of the SXT CCD on Thursday. Detailed instructions will be given to the tohbans later in the week.

JST Day UT Start Time Pass Table ID

Monday PM       23-Jul-01 07:47      3    010723 P3 ARS2 STD+J100  
 Tuesday PM      24-Jul-01 04:24      1    010724 P1 ARS1 DIFF 
 Tuesday PM      24-Jul-01 07:46      3    010724 P4 ARS1 STD
 Wednesday PM    25-Jul-01 07:45      3    010725 P3 ARS1 DARK
 Thursday PM     26-Jul-01 04:22      1    010726 P1 ARS1 BAKE
 Friday PM       27-Jul-01 04:21      2    010727 P2 ARS1 STD
 Saturday PM     28-Jul-01 04:21      2    010728 P2 ARS1 STD
This table plan is likely to change. Prepare for last minute changes.

Continuing requests:

KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for example due to typhoons) or an SXT table cannot be uploaded for any reason, please telephone and e-mail the Chief Observer immediately. (sxt_co@isass0.solar.isas.ac.jp, copy to sxt_st@flare2.solar.isas.ac.jp).

KSC Tohbans: In general flare mode supersedes table upload, i.e. if a flare is in progress please do not upload a new table, and contact the chief observer. Normally it is OK to go ahead with the planned table without change on the next pass, if it is available. Chief observers should keep an eye on this.