SXT Status Report November 12, 2001 - November 26, 2001 (Weeks 46-47) D. McKenzie, J. Sato, A. Takeda SOLAR ACTIVITY Activity was moderate, the background staying near GOES C1 for the period. There were seven M flares and one X flare. A sigmoid target of opportunity campaign was declared for active region NOAA 9704, which subsequently produced a slow C-class LDE and two M flares (M1.2, M9.9). The events were geoeffective and proton productive. OBSERVING CAMPAIGNS Yohkoh participated in no coordinated observations during these two weeks, except for the sigmoid alert declared Nov. 21 and terminated Nov. 26. Please see our webpages for details about campaigns past and future: http://isass1.solar.isas.ac.jp/sxt_co/sxt_catalog.html http://isass1.solar.isas.ac.jp/sxt_co/sxt_future.html SXT INSTRUMENT STATUS AND CALIBRATION ACTIVITIES We emerged from the Leonids unscathed, no encounter was detected. On 22 November an SEU caused SXTE-U to hang up. This occurred during SAA at approximately 16:27 UT, and strangely enough there was no error flag. Yobi-B was commanded at approximately 15:27 UT on 24-Nov, and recovery plan was carried out throughout the next three KSC passes. Afterwards, the instrument appears to be operating properly. Yohkoh normal pointing was adjusted on 20 November. In week 47 we reset the flare table to 1x1 PFIs, with full resolution unsaturated images in Be and AlMg filters, plus deep exposures in all resolutions in AlMg filter. TELEMETRY DOWNLINKS Week Wallops Santiago Goldstone Canberra Madrid NASA Japan 46 26 1 0 6 0 33 33 47 23 0 0 0 4 27 39 Kagoshima should average 6*5+2 = 32 and the NASA target is 7*6 = 42. SXT OBSERVING SEQUENCE TABLES ====================================================================== JST Day UT Start Time Pass Table ID Monday AM 12-NOV-01 00:52 2 011111 P2 ARS1 STD* Tuesday AM 12-NOV-01 21:26 1 011112 P1 ARS1 DIFF Tuesday AM 13-NOV-01 02:29 4 011112 P4 ARS1 STD* Wednesday AM 13-NOV-01 21:21 1 011113 P1 ARS1 DARK Wednesday AM 14-NOV-01 02:24 4 011113 P4 ARS1 STD* Thursday AM 14-NOV-01 22:57 4 011114 P4 ARS1 STD Friday AM 15-NOV-01 22:52 2 011115 P2 ARS1 STD Saturday AM 16-NOV-01 22:48 3 011116 P3 ARS1 STD+LEO Monday AM 18-NOV-01 20:58 2 011118 P2 ARS1 STD* Tuesday AM 19-NOV-01 19:11 1 011119 P1 ARS1 DIFF* Tuesday AM 20-NOV-01 00:15 4 011119 P4 ARS1 STD* Wednesday AM 20-NOV-01 17:27 1 011120 P1 ARS1 DARK* Wednesday AM 20-NOV-01 22:29 4 011120 P4 ARS1 STD* Thursday AM 21-NOV-01 19:02 2 011121 P2 ARS1 STD* Friday AM 22-NOV-01 20:38 3 011122 P3 ARS2 STD* Saturday AM 23-NOV-01 18:52 2 011123 P2 ARS2 STD* Sunday AM 24-NOV-01 20:28 4 011124 P2 ARS1 STD* ==================================================================== Data reformatting is complete through October, 2001 (week 43). OBSERVING SEQUENCES: See above for remarks on the flare mode. SCIENCE NUGGETS: November 16: "A skinny but robust coronal hole", reports on a coronal hole observed extending from the north pole at the end of October through early November. November 23: "Another Sigmoid, with Partial Success", describes the sigmoid campaign on NOAA 9704, which produced some geoeffective eruptions. The full list of recent nuggets is kept on http://isass1.solar.isas.ac.jp/sxt_co/index.html and the current week's nugget also normally resides on http://isass1.solar.isas.ac.jp/sxt_co/SXTweekly.html For the complete nugget archive, see one of the following sites. http://isass1.solar.isas.ac.jp/nuggets/ (Japan), http://solar.physics.montana.edu/nuggets/ (Montana), http://www.lmsal.com/YPOP/Nuggets/ (California) and http://ydac.mssl.ucl.ac.uk/nuggets/ (UK). SEMINARS: There were no seminars during this period. PERSONNEL: H. S. Hudson departed; D. McKenzie and new Chief Observer J. Sato arrived. TOHBANS (spacecraft operators) for week 46 SSOC Tohbans: Y.Suematsu, K.Kumagai KSC Tohbans: T.Yokoyama, Kawano SXT_CO: A. Takeda SXT_SW: J. Bartus TOHBANS (spacecraft operators) for week 47 SSOC Tohbans: A. Takeda, M. Kubo KSC Tohbans: N. Kawano, H. Sekiguchi SXT_CO: D. McKenzie, J. Sato SXT_SW: J. Bartus