To:sot_shift from: Dan Schwartz date: 04 Dec 03, 12:00noon EST Subject: SOT shift report 2003-12-04 L1596 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_04_2003_L1596.txt. Shift L1596. Start at 338:13:00 GMT = 07:15am 04 Dec EST End 10:30am 04 Dec SOT Lead DAS (Times will be given in GMT on day 338.) PLAN ---- Uplink load DEC0403A and resume observing after radiation shutdown. Do obsid 4215, an ACIS-I observation of the rich, hot, luminous, z=0.201 X-ray cluster of galaxies Abell 520, to study the effects of mergers on the cluster environment. Next Comms: 338:1915 to 2015 339:0345 to 0445 339:1130 to 1255 339:2050 to 2150 340:0250 to 0445 340:1200 to 1300 340:1610 to 1750 341:0345 to 0445 341:1100 to 1200 341:1650 to 1850 342:0120 to 0220 342:0945 to 1045 342:1550 to 1750 343:0250 to 0450 343:1300 to 1500 343:1800 to 1900 Orbital events: 2003:338:06:45:17.673 597 EPERIGEE ORBIT PERIGEE 2003:339:14:29:38.600 598 EAPOGEE ORBIT APOGEE 2003:340:22:14:18.092 598 EPERIGEE ORBIT PERIGEE 2003:342:05:58:14.572 599 EAPOGEE ORBIT APOGEE 2003:343:13:43:22.543 599 EPERIGEE ORBIT PERIGEE 2003:344:21:26:51.006 600 EAPOGEE ORBIT APOGEE 2003:346:05:12:00.184 600 EPERIGEE ORBIT PERIGEE 2003:347:12:55:13.818 601 EAPOGEE ORBIT APOGEE 2003:348:20:39:53.551 601 EPERIGEE ORBIT PERIGEE 2003:350:04:23:14.085 602 EAPOGEE ORBIT APOGEE 2003:351:12:07:10.946 602 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at AOS, 338:12:24, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 8 FIDS = 0 RA = 39.999 deg Dec = 39.999 deg ROLL = 242.348 deg Format = 1 OBSID = 60462 maneuver position SIM FA = -990 SIM TSC = -99616 (HRC-S) DITHER = ENAB HETG = OUT (79.46 deg) LETG = IN ( 4.09 deg) HRC-S HV is ON EPHIN Geom = LARG E150 = 90.2 E300 = 1.4 E1300 = 0.0 LT 10.0 (RADMON P4GM = 14.6 LT 300. Disabled) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.3240 mu-a Ascending through 58404 km. ACIS focal plane temperature -119.7. 12:20 Radiation telecon gives GO for DEC0403A loads. Rob writes: "The ACE EPAM rates are declining, with P3 estimates around 25000 p/s now, and EPHIN rates are low." 12:41 Run CAP 617 to enable RADMON and SCS107. 13:27 Enter normal maneuver mode. Change TM format to Format 2 13:30 Change OBSID to 4215 13:32 All stars are lost 14:02 Start SIM translation 14:05 Start LETG retraction 14:08 Start SIM focus move 14:10 Motions complete. In normal point mode. 3 stars, 1 fid light. 14:11 5 stars, 3 fids are acquired. Status at LOS, 338:14:22, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 73.550 deg Dec = 2.882 deg ROLL = 8.612 deg Format = 2 OBSID = 4215 Abell 520 SIM FA = -535 SIM TSC = 90119 (ACIS-I) DITHER = ENAB HETG = OUT (79.46 deg) LETG = OUT (77.59 deg) HRC-S HV is ON EPHIN Geom = LARG E150 = 131.7 E300 = 1.5 E1300 = 0.0 LT 10.0 (RADMON P4GM = 10.8 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.3200 mu-a Ascending through 69623 km. ACIS focal plane temperature -119.7. NOTES/ISSUES/PROBLEMS Note that ACIS obsid 4215 starts before SIM move: this obsid will contain some cal source data. An estimated 86.9 ks of scheduled observing time was lost due to the radiation shutdown. (This does not include any time during observation of Mu Lep which may prove unuseable due to high background.) From the 9am status meeting: Two supports over the last 24 hours, another in progress. No issues. Ran CAP 617 to re-enable SCS 107 and RADMON. Approved the DEC0403A loads and uplinked them to resume the science observing program. Comm at 338:1915 to 2015 has been restored. It was deleted because we had expected to be doing the ONLS 9.3.4 install. The install was postponed because of working radiation and TOO replanning. DEC0803 products are expected out this morning for a load review this afternoon at a time to be announced (avoiding the FD CCB slot at 2pm). A review yesterday was very successful for revising requirements for the OBC RADMON software. These revised requirements will allow use of HRC shield or MPC rates to trigger SCS 107, and will allow different trigger levels to be applied at different times during each orbit. Implementation will require a re-compile of the OBC software, and will take at least several weeks to develop and test. However, a concept was developed that would allow a very quick implementation of patches only, which would use HRC rates to trigger RADMON. Other new features, e.g., variable trigger levels, would not be implemented. This would be used in case of catastrophic failure of EPHIN before the revised RADMON software becomes available. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 3764 MU LEP HR 1702 335:23:29 HRC-S LETG looks fuzzy. check aspect. ------------------------------------------------------- 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 -------------------------------------------------------