To:sot_shift from: Dan Schwartz date: 29 Jul 04, 12:00noon EDT Subject: SOT shift report 2004-07-29 L1834 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/web-cxc/htdocs/acis/SOT_reports/Jul_29_2004_L1834.txt. Shift L1834. Start at 211:12:00 GMT = 08:00am 29 Jul EDT End 10:00am 29 Jul SOT Lead DAS (Times will be given in GMT on day 211.) PLAN ---- Holding in normal point mode after SCS 107 was triggered at 210:19:24:29. Plan to resume science observations with obsid 4725, to study ultraluminous X-ray sources in the nearby interacting galaxy pair, NGC 4485/90. No Comm this shift. Next Comms: 211:1850 to 2050 212:0210 to 0410 212:1305 to 1405 212:1750 to 1950 213:0345 to 0445 213:1205 to 1310 213:1800 to 1900 214:0245 to 0345 Orbital events: 2004:211:06:18:54.763 687 EPERIGEE ORBIT PERIGEE 2004:212:14:01:57.083 688 EAPOGEE ORBIT APOGEE 2004:213:21:45:35.854 688 EPERIGEE ORBIT PERIGEE 2004:215:05:29:32.387 689 EAPOGEE ORBIT APOGEE 2004:216:13:12:45.203 689 EPERIGEE ORBIT PERIGEE 2004:217:20:57:10.123 690 EAPOGEE ORBIT APOGEE 2004:219:04:40:57.869 690 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at LOS, 211:11:58, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 0 RA = 215.081 deg Dec = 53.587 deg ROLL = 261.035 deg Format = 2 OBSID = 4757 Holding at RXJ1420+5334 SIM FA = -467 SIM TSC = -99616 (HRC-S) DITHER = ENAB HETG = OUT (79.46 deg) LETG = OUT (77.59 deg) HRC-I HV is ON EPHIN Geom = SMAL E150 = 130731.7 E300 = 257.0 E1300 = 2.0 LT 10.0 (RADMON P4GM = 245.9 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 1.0200 mu-a Ascending through 58200 km. ACIS focal plane temperature -115.0 degC. EPH temp 93.79 deg F. NOTES/ISSUES/PROBLEMS SCS 107 ran at 210:19:24:29, due to an E1300 trip. This is presumably due to the puffed up radiation belts. CAP 921, the contingency eclipse load, was run but was knowingly started too late due to late schedule of the comm start. With only about 30 minutes before eclipse, manual commanding was done to configure for eclipse -- this was possible because the attitude was only 17 degrees off solar normal and therefore suitable to hold through the eclipse. Eclipse commanding was successful, and the eclipse proceeded nominally. Because an earth occultation was upcoming, a load was built to go into gyro hold through the occultation and then return to normal point. Alternately we would go into normal sun hold, which would require some effort for recovery. The load was uplinked about 10 minutes before end of comm, and was successful. From the 9am status meeting: Three supports over the past day, no issues. Two supports were extended to support the gyro hold uplink and a potential need to recover from Normal Sun Mode. The latter did not occur due to the success of the gyro hold. No loads are currently running. JUL2904A products have been sent out for a noon (EDT) load review. Loads need to be uplinked at the 18:50 AOS to support resumption of the science observing program at 20:30. If this is done, the total loss of science observing time will be 23.4ks. CAP 929 was prepared and reviewed to perform a long ACIS CTI run prior to resumption of science observing. However, EPHIN rates were too high at the 12:00 LOS to allow execution. Celestial observations will resume too soon after the start of the next comm to allow an effective ACIS cti run. Expect to run CAP today to set the short eclipse flag, and to enable SCS 107. Plan to create CAP 930 to capture the manual commanding done for eclipse configuration. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 5350 MACS1115.2+5320 210:15:14 ACIS-I NONE looks good 4757 RXJ1420+5334 210:17:35 ACIS-S NONE target not obvious. interrupted by SCS 107 ------------------------------------------------------- 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 -------------------------------------------------------