To:sot_shift from: Dan Schwartz date: 18 Jul 00, 12:00noon EDT Subject: SOT shift report 2000-07-18 L361 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jul_18_2000_L361.txt. Shift L361. Start at 200:12:00 GMT = 08:00am 18 Jul EDT End 12:00 noon 18 Jul SOT Lead DAS (Times will be given in GMT on day 200. In general times are rough, not precise.) PLAN Continue running JUL1700. This is a series of ACIS-S/HETG observations. Finish OBSID 5, the T Tauri star TW Hya; then do OBSID 701, the low mass X-ray binary X0918-54; and OBSID 121, the LMC supernova remnant N132D. Next Comms 200:19:40 to 21:40 201:04:10 to 06:10 201:10:40 to 12:40 202:00:10 to 01:10 202:09:40 to 10:40 202:21:00 to 22:00 203:07:25 to 08:25 203:15:20 to 16:20 204:00:10 to 02:10 EVENTS Status at LOS, 200:11:19, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 165.465 deg DEC = -34.681 deg ROLL = 226.491 deg Format = 2 OBSID = 5 TW HYA SIM FA = -467 SIM TSC = 74423 (ACIS-S) HETG = IN ( 6.3 deg) LETG = OUT (78.3 deg) HRC-I HV is ON EPHIN: A-Leak = 0.3640 mu-a B-Leak = 0.0680 mu-a EPHIN RATES: EPHIN Geom = LARG E1300 = 180 LT 1318.52 (RADMON P4GM = 360 LT 3542.40 Triggers) P41GM = 2 LT 100.00 Ascending through 141745 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS Effects of the solar proton event are gradually subsiding. ACE 130-214 keV proton fluxes are about 1200. Our EPHIN rates are still noticeably enhanced, even though we are nearing apogee. The ACIS team looked at the rates of threshold crossings, amplitude rejects, and grade rejects during the comm pass at 199:23:40 last night. This was during the observation of M87. The rates all looked normal, notably on the backside chips, which indicates that ACIS is not being hit by an unduly large flux of soft protons. A brief telecon confirmed that it was okay to proceed with the SCS loads. A preliminary analysis of CTI data by C. Grant indicates "no big hit" due to the radiation events of last week. From the 9am status meeting: 3 supports, 5 dumps, all data recovered. Onboard loads good until 203:07:25, next segment to be uplinked at 200:19:40 pass. The routine CAP 563a was run to check the CPE warm start count, and it returned the correct value, count=1. The first operational support using DSN 26m automation equipment was run successfully on the 200:09:20 pass this morning with DSS-16 at Goldstone. This will now be the standard equipment used for DSS-16. The old equipment will be available and "shadow" the passes for some time. Jeff Holmes reports: "It is important to note that the automation equipment DOES NOT currently provide the capability to monitor CFC count. CFC count from the legacy string was used during this particular pass and should be used whenever legacy equipment is available for shadowing. This omission is an issue which should be worked with the NOPE." He also notes that we need to verify the time delay calibrations for this equipment. In the absence of a CFC count we may want to redo the standard procedures such that tape recorder pointers are not moved after a dump, but before the subsequent dump. Jeff has found that in general the data is delivered in time to do this, even though the spec allows 24 hour delay. Mission planning is proceeding with JUL2300, products may be out today, with review tomorrow. Quick look data: No data due to interruption of the observing program. ------------------------------------------------------- Dan Schwartz, MS #3 das@head-cfa.harvard.edu phone: (617)495-7232 FAX: (617)495-7356 cell phone: (617)512-5627 pager: 800-759-8352 PIN 1636502 or e-mail 1636502@skytel.com -------------------------------------------------------