11 June 1995 N. Nitta SXT CHIEF OBSERVER REPORT AND TABLE PLAN SXT TABLE PLAN FOR WEEK 24 (11-JUN-95 to 17-JUN-95) We will continue two campaigns (Pic du Midi and XBP) this week. Although we will not explicitly try filaments, coordination with MSO (Hawai'i) will also be very important. We will probably postpone weekly dark calibration until the campaigns are wrapped up. We will take every opportunity to take terminator images. The observing objectives of this plan are: - Pic-du-Midi campaign (ARS2). - XBP campaign (fixed pointing). - The above campaigns may overlap with the filament campaign - Take offpoint terminator images. - Dark Calibration later in the week. The SXT Table Plan for the week is as follows. Please remember that this is subject to change. The date in the table ID reflects the UT date of the first pass. KSC Time (start) in JST Pass Table ID Comments _____________(= UT + 9 hrs)_____#_______________________________ Monday 12-JUN-95 01:12 1 950611 P1 ARS0 XBP CAMP 12-JUN-95 08:04 5 950611 P5 ARS2 CHROMO CAMP Tuesday 13-JUN-95 01:30 1 950612 P1 ARS0 XBP CAMP 13-JUN-95 08:24 5 950612 P5 ARS2 CHROMO CAMP Wednesday 14-JUN-95 01:49 2 950613 P2 ARS0 XBP CAMP 14-JUN-95 07:00 5 950613 P5 ARS2 CHROMO CAMP Thursday 15-JUN-95 00:26 1 950614 P1 ARS0 XBP CAMP 15-JUN-95 05:36 4 950614 P4 ARS2 CHROMO CAMP Friday 16-JUN-95 02:28 3 950615 P3 ARS0 XBP CAMP 16-JUN-95 05:55 5 950615 P5 ARS2 CHROMO CAMP Saturday 17-JUN-95 02:48 3 950616 P3 ARS0 XBP CAMP 17-JUN-95 06:15 5 940616 P5 ARS1 DKCAL Sunday 18-JUN-95 01:24 3 950617 P3 ARS1 STD+LONG ************* KSC HOLIDAY until Monday night *************************** BearAlert at 9-JUN-95 21:45 UT The region 7877 is rapidly growing with 4 arch flaments and a delta spot. It is too early to predict much, but it is very much worth watching. (243W, 094N at 1900jun 9) hz, whm Terminator-Offpointing: The terminator-offpointing program will continue this week, although the number of terminater images is deccreasing. The SSOC tohbans will be required to manually insert the off-point OGs for the terminators in the OP tables. The SSOC tohbans, 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 be used. Dumping Patrol images: We request that KSC tobans 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. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SXT CHIEF OBSERVER'S REPORT for Week 23: 4-JUN-95 to 10-JUN-95 The rainy season has started in most areas of Japan, but Yohkoh continues to observe the Sun and to produce nice data. In spite of the virus brought back from the Nagoya UV & X-Ray Spectroscopy meeting (?), most people are OK here and enjoy scientific analysis of the Yohkoh data, taking advantage of this fantastic facility at ISAS. SXT INSTRUMENT STATUS The SXT has had no problem. Although we had some problem communicating with the campaigners due to a holiday (5 June) in France and the SPD meeting in Tennessee, the Pic du Midi campaign started on 7 June and the XBP campaign on 9 June. There were fewer terminator images than the previous week. PIC DU MIDI CAMPAIGN The region AR 7877 was found to be growing, so it was selected as the target for the Pic du Midi campaign. According to the reports from France, they had good coverage of observations. The region looked like an "anamone" type, but we did not see a jet from it. Instead point-like and loop-like brigntenings were repeatedly observed. Although MSO reported changes in a filament to the east of AR 7877, SXT data from 9 June showed more changes in an area in W or SW. Unavailability of H-alpha full-disk images at SELSIS in a timely manner made it difficult for us to figure out where the filament was. XBP CAMPAIGN Although Karen Harvey's request was to point SXT to a darkest area, we observed an area close to AR 7877, because we did not want to go away from the region. The selected area had a coronal hole channel in it, where we observed a strong XBP (which flareed) and a more transient source.