24 December 1995 Serge Savy SXT CHIEF OBSERVER REPORT AND TABLE PLAN SXT CHIEF OBSERVER'S REPORT for Week 51: 18-DEC-95 to 24-DEC-95 SOLAR ACTIVITY The Sun was quiet this week with no major flares observed by Yohkoh. For most of the week there was only one small active region (AR 7932) on the disc. The full frame images taken at the end of week suggest that a brighter region will soon appear on the East limb. SXT INSTRUMENT STATUS An SXT bitmap error was found on pass 3 19 December, and recovered during the same pass. SXT continues to function normally. CAMPAIGNS No formal campaigns happened. SXT took some deep exposures in PFI's near disc centre. SEMINARS There was a regular Yohkoh seminar on Wednesday. The speaker was Christina Cadavid (California State University Northridge) "On the Multifractal Distribution of Solar Magnetic Fields". SXT TABLE PLAN FOR WEEK 52 (25-DEC-95 to 31-DEC-95) This week we will return to the standard table. There will be no campaigns this week. The standard FFI diffuser images (both low8 and compressed) will be taken on Tuesday as part of a standard table. The dark calibration table will be loaded on Thursday. On Friday we will return to the standard table for the long new year holiday. Long FFI exposures will not be included in this table. This week we continue with the terminator program, but no new OG's need to be prepared. The provisional SXT Table Plan for the week is as follows: KSC Time (start) in JST Pass Table ID _____________(= UT + 9 hrs)______#_______________________________ Monday 25-DEC-95 No table load Tuesday 26-DEC-95 07:24 3 951225 STD+DIFFU Wednesday 27-DEC-95 No table load Thursday 28-DEC-95 04:36 2 951227 P2 ARS1 DKCAL Friday 29-DEC-95 03:13 2 951228 P2 ARS1 STD *** Please note that this table plan may change *** 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. 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.