29 November 1998
Nariaki Nitta
Hugh Hudson
SXT CHIEF OBSERVER'S REPORT AND TABLE PLAN CHIEF OBSERVER'S REPORT for Week 48 22-Nov-98 to 28-Nov-98
GENERAL
Yohkoh and SXT continued to perform without problem this week. Solar activity was very high. Following the X3.7 flare reported last week, AR 8384 produced three more X-class flares on the southwest limb. Then another region AR 8395 produced an X3.3 flare (LDE) in the northeast quadrant.
SXT TECHNICAL
The SXT instrument was in fine working order.
SXT SCIENCE
For Web material see
Current Week: http://www.solar.isas.ac.jp/sxt_co/SXTweekly.html Current Week: http://www.solar.isas.ac.jp/sxt_co/981127.html Index: http://www.solar.isas.ac.jp/sxt_co/index.htmlThis week's Science Nugget describes ``The X Flares of the New Cycle.''
CAMPAIGNS
Coordination with CDS to observe an active region in high cadence was not successful due to poor communication.
PERSONNEL
Lidia van Driel-Gesztelyi completed her short but very intensive visit.
SEMINARS
There was no seminar this week.
DRAFT SXT TABLE PLAN, WEEK 49 (29-Nov-98 -- 5-Dec-98)
We are not aware of scheduled campaigns we may want to participate, but we see in the CDS weekly plan a few non-scheduled items that are of interest, including high cadence study of an active region and observations of CME onsets (with ULYSSES/UVCS/LASCO).
Monday 30-Nov-98 19:55 4 981130 P4 ARS1 DARKCAL Tuesday 1-Dec-98 17:58 4 981201 P4 ARS1 STD Wednesday 2-Dec-98 13:37 2 981202 P2 ARS1 DIFF Wednesday 2-Dec-98 17:02 4 981202 P4 ARS1 STD Thursday 3-Dec-98 12:12 1 981203 P1 ARS2 CDS AR Thursday 3-Dec-98 17:19 4 981203 P4 ARS1 STD Friday 4-Dec-98 14:10 2 981204 P2 ARS2 CDS AR Friday 4-Dec-98 17:36 4 981204 P4 ARS1 STD Saturday 5-Dec-98 14:27 3 981205 P3 ARS1 STD
Continuing requests:
KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for example due to a typhoon) or an SXT table cannot be uploaded for some 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).
SSOC Tohban: On the weekly visible diagram, please mark the official five passes first and then cross out those passes that will be given to other satellites. That way we can keep the numbering straight in the Yohkoh software system.
SSOC Tohban: SXT operations do not currently include terminator off- pointing. It is unnecessary this week to ask the SXT Chief Observer for terminator off-pointing information.
KSC Tohbans: In general flare mode supersedes table upload, ie 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.