19 June, 2000 H. S. Hudson B. N. Handy CHIEF OBSERVER'S REPORT for Week 25 12-Jun-00 through 18-Jun-00 GENERAL The highlight of the week was an offpoint to observe the Crab Nebula with HXT. SXT emerged from the observation unscathed. We didn't miss any X-class flares during the Crab study, but did manage to miss three M-class flares in the day following due to an error in the SXT table. SXT TECHNICAL Yohkoh offpointed for one day to look at the Crab Nebula with the HXT this week. (SXT was turned off for this duration.) Yohkoh returned to normal pointing with no problems, and SXT is again working normally. Yohkoh temporarily stopped collecting PFI images and was HALTed during the invisible orbits for a day after the Crab. This was tracked down to an error in the SXT table, and was corrected the following day at the first visible pass. SXT SCIENTIFIC For Web material see Current Week: http://isass1.solar.isas.ac.jp/sxt_co/000616.html Index: http://isass1.solar.isas.ac.jp/sxt_co/index.html This week's nugget looks at some really new BCS observations made during the Crab offpoint. CAMPAIGNS The TRACE-La Palma observations continued. We are not officially supporting this campaign. The Crab Observation took one full day. 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 H. Hudson departed. B. Handy arrived. SEMINARS R. Cameron (SUT), "Magnetic Field Changes During Flares" TELEMETRY DOWNLINKS Week Wallops Santiago Goldstone Canberra Madrid Japan 24 33 0 3 0 13 23 25 31 0 5 0 4 30 26 29 0 3 7 3 26 SXT TABLE PLAN, WEEK 26 (18-Jun-00 - 25-Jun-00) draft No special observations or campaigns are planned for this week. ________________________________#_______________________________ JST Day UT Start Time Pass Table ID Monday PM 19-JUN-00 09:18 3 000619 P3 ARS1 DARK Tuesday PM 20-JUN-00 07:45 2 000620 P2 ARS1 DIF Tuesday PM 20-JUN-00 11:09 4 000620 P4 ARS1 STD Wednesday PM 21-JUN-00 07:53 2 000621 P2 ARS1 STD Thursday PM 22-JUN-00 06:20 2 000622 P2 ARS1 STD Friday PM 23-JUN-00 08:10 3 000623 P3 ARS1 STD Saturday PM 24-JUN-00 06:36 3 000624 P3 ARS1 STD This table plan is subject to change. Continuing requests: KSC & SSOC Tohbans: If any KSC passes are likely to be cancelled (for example due to heavy snowfall) 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). 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.