3 December 1995 Serge Savy/Nariaki Nitta SXT CHIEF OBSERVER REPORT AND TABLE PLAN SXT CHIEF OBSERVER'S REPORT for Week 48: 27-NOV-95 to 3-DEC-95 Highlights this week: High time resolution PFI observations of an anemone region (AR 7929) near disc centre on morning of 1 December UT. SOLAR ACTIVITY The Sun was quiet this week with no major flares observed by Yohkoh. A small active region (AR 7929) emerged on 28 November. This was an anemone region with a small sunspot. It produced two tiny jets on the western edge that were observed in the PFI images at 10:10 and 10:30 UT on 30 November. SXT INSTRUMENT STATUS SXT continues to function normally. There were no SXT errors this week. CAMPAIGNS On Friday we loaded a table for 2 visible orbits of PFI-dominant observations to obtain observations of an actve region with 2 second time resolution in a single filter. The anemone shaped AR7929 was the target. The observations were successful but the actual time cadence was 4 seconds because the target was not bright enough for sufficiently short exposures. The KSC tobans pointed out the region had already become stable by the time the special observations took place. These data will be used by David McKenzie of U. Delaware for investigation of wave heating of AR loops as part of his PhD thesis research. SEMINARS There was a regular Yohkoh seminar on Wednesday. The speakers were K. Fujisaki and Y. Uchida, both from the Science University of Tokyo. The title was "Polar Arcade Formation and the Giant Cusp of Jan 25, 1992", but a few other similar events were also discussed. SXT TABLE PLAN FOR WEEK 49 (4-DEC-95 to 10-DEC-95) There will be no official campaigns this week but on Monday we will obtain deep PFI exposures of the quiet corona near disc centre unless there is a very bright region. There will be a DKCAL table loaded on Tuesday. The DKCAL table will no longer include an FFI diffuser image. Instead diffuser images (both low8 and compressed) will be taken as part of a standard table each week. This week the diffuser images will be included in a standard table loaded on Wednesday afternoon for two visible orbits only. On Thursday we plan to load a standard table with the flare mode tables set to record PFIs in only one filter. This is to obtain high time cadence observations of any flare that may occur (Hudson). The next day (Friday), we will return to a standard table with the normal flare table settings. This week we continue with the terminator program, for which we request preparation and upload of new offpoint OG files. The provisional SXT Table Plan for the week is as follows: KSC Time (start) in JST Pass Table ID _____________(= UT + 9 hrs)______#_______________________________ Monday 4-DEC-95 19:15 4 951204 P4 ARS0 QUIET CORON Tuesday 5-DEC-95 16:09 2 951205 P2 ARS1 DKCAL Wednesday 6-DEC-95 14:45 2 951206 P2 ARS1 STD+DIFFUSE Wednesday 6-DEC-95 18:11 4 951206 P4 ARS1 STD+LONG Thursday 7-DEC-95 16:48 3 951207 P3 HI CADENCE FLARE Friday 8-DEC-95 15:24 3 951208 P3 ARS1 STD+LONG Saturday 9-DEC-95 15:43 3 951209 P3 ARS1 STD+LONG SSOC TOHBAN, please fax the preliminary OP list to D-tou when it contains a terminator so that the Chief Observer can suggest which OG's to use. Please also fax a printout of the new OGs when they have been prepared, so that the Chief Observer can check them. Dumping Patrol images: We request that KSC tohban continue to dump a patrol image each time an SXT table is loaded to facilitate the study of optimizing ARS parameters for an awfully quiet period. NEW OG COMMANDS REQUIRED FOR SXT TERMINATOR PROGRAM SSOC TOHBAN, please prepare the following offpoint OGs and upload them as soon as possible. ******************************************************************** OG-33 (Decimal) TARGET ANGLE-X -0.0923072 (DEG) TARGET ANGLE-Y 0.0323607 (DEG) BLOCK COMMAND ===> 81 00 F9 7B 02 20 00 00 -0.779764 0.0449829 COMMAND NAME: S/C E.044 N.779 (offset angles in arcmin) ----- OG EDITOR OUTPUT --------------- NUMBER : 33 NAME : S/C E.044 N.779 1 04-DC-8A ACS: ACP DATA SET+B7 2 04-BC-81 ACS: BC 3 04-BC-F9 ACS: BC 4 04-BC-7B ACS: BC 5 04-BC-02 ACS: BC 6 04-BC-20 ACS: BC 7 04-BC-00 ACS: BC 8 04-BC-00 ACS: BC 9 04-DC-11 ACS: BC EXEC +++ ******************************************************************** OG-34 (Decimal) TARGET ANGLE-X -0.0832650 (DEG) TARGET ANGLE-Y 0.0309543 (DEG) BLOCK COMMAND ===> 81 00 FA 1E 02 07 00 00 -0.237232 -0.0394030 COMMAND NAME: S/C W.039 N.237 (offset angles in arcmin) ----- OG EDITOR OUTPUT --------------- NUMBER : 34 NAME : S/C W.039 N.237 1 04-DC-8A ACS: ACP DATA SET+B7 2 04-BC-81 ACS: BC 3 04-BC-FA ACS: BC 4 04-BC-1E ACS: BC 5 04-BC-02 ACS: BC 6 04-BC-07 ACS: BC 7 04-BC-00 ACS: BC 8 04-BC-00 ACS: BC 9 04-DC-11 ACS: BC EXEC +++ ******************************************************************** OG-35 (Decimal) TARGET ANGLE-X -0.0911881 (DEG) TARGET ANGLE-Y 0.0304854 (DEG) BLOCK COMMAND ===> 81 00 F9 8F 01 FE 00 00 -0.712617 -0.0675331 COMMAND NAME: S/C W.067 N.712 (offset angles in arcmin) ----- OG EDITOR OUTPUT --------------- NUMBER : 35 NAME : S/C W.067 N.712 1 04-DC-8A ACS: ACP DATA SET+B7 2 04-BC-81 ACS: BC 3 04-BC-F9 ACS: BC 4 04-BC-8F ACS: BC 5 04-BC-01 ACS: BC 6 04-BC-FE ACS: BC 7 04-BC-00 ACS: BC 8 04-BC-00 ACS: BC 9 04-DC-11 ACS: BC EXEC +++ ---------------------------------------------------------