To:sot_shift from: Dan Schwartz date: 01 Oct 01, 12:00noon EDT Subject: SOT shift report 2001-10-01 L802 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Oct_01_2001_L802.txt. Shift L802. Start at 274:12:00 GMT = 08:00am 01 Oct EDT End 12:00 noon 01 Oct SOT Lead DAS (Times will be given in GMT on day 274.) PLAN ---- Continue running load SEP3001B. Finish ACIS-S OBSID 2037 of IRAS 23128-5919, an UltraLuminous InfraRed Galaxy, and do ACIS-S OBSID 1950 of the Puppis A SNR shock front. Then do CTI measurements surrounding the perigee passage. No comm this shift. Next Comms: 274:1650 to 1850 275:0130 to 0230 275:0910 to 1010 275:2000 to 2115 276:0400 to 0500 276:1010 to 1110 276:1740 to 1940 276:2300 to 0000 Orbital events: 2001:274:23:08:54.351 297 ORBIT PERIGEE 2001:276:06:52:59.194 298 ORBIT APOGEE 2001:277:14:36:19.746 298 ORBIT PERIGEE 2001:278:22:20:51.881 299 ORBIT APOGEE 2001:280:06:04:51.862 299 ORBIT PERIGEE EVENTS ------ Status at LOS, 274:08:24, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 348.906 deg Dec = -59.064 deg ROLL = 339.779 deg Format = 2 OBSID = 2037 IRAS 23128-5919 SIM FA = -467 SIM TSC = 75623 (ACIS-S) HETG = OUT (79.84 deg) LETG = OUT (77.96 deg) HRC-S HV is ON EPHIN Geom = LARG E1300 = 1.0 LT 10.0 (RADMON P4GM = 12.4 LT 300. Triggers) P41GM = 0.4 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.3840 mu-a Descending through 10866 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS From the 9am status meeting: Over the weekend, 9 supports, no problems, 3 load segments were uplinked and on-board loads are good until 277:08:25. All SSR dumps are current. However, some DSN glitches resulted in loss of a few hundred, scattered VCDU from the CTI measurements, a negligible quantity. CAP 746C was run on Saturday to start an ACIS CTI measurement, prior to resumption of observing schedule. OCT0801 products will be out today for an email review tomorrow. A few yellow thermal limits are persisting, due to the long attitude hold during the radiation event. GOT will be working on promoting GRETA 1.1.1, as approved at FD CCB last week. On Saturday, the SEP3001B load was uplinked and activated, and the celestial observing program resumed as of 273:05:10. A total of 355 Ksec of scheduled celestial observing time was lost during the radiation event. Of this, NONE could have been used. We thank the FOT and mission planners for many replans prior to the one actually used! ACE radiation rates were still high when we resumed observing, and we accumulated an ACE fluence of 1.65e+09 on ACIS during the 120Ksec of exposure. the CRM fluence was predicted at 4.97e+09, which is extremely close to the same predicted effect on CTI when the relative normalizations deduced by Rob are considered. The sun is continuing to be active, with today's report stating "A major M9.1 flare was recorded at 05:15 UTC. Region 9636 was bright at the time and was the likely source of the flare. A very long duration M2.3 event is in progress. Its source is in region 9628 at the southwest limb. A massive CME has been observed over the southwest limb." EPHIN rates are a factor ~10 higher than in minimum conditions. However, HRC/LETG observations comprise the first day and a half of the next orbit, with ACIS not being exposed to the aim point until 276:20:38. Quick look data: No quick look due to postponement of observations during radiation event. ------------------------------------------------------- Dan Schwartz, MS #3 das@head-cfa.harvard.edu phone: (617)495-7232 FAX: (617)495-7356 cell phone: (617)512-5627 pager: 877-693-7198 PIN 693-7198 or e-mail 6937198@archwireless.net -------------------------------------------------------