To:sot_shift from: Dan Schwartz date: 11 Apr 00 , 2:00pm EDT Subject: SOT shift report, Shift L263 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_11_2000_L263.txt. Shift L263. Start at 102:12:00 GMT = 08:00am 11 Apr EDT End 2:00 pm 11 Apr SOT Lead DAS (Times will be given in GMT on day 102. In general times are rough, not precise.) PLAN Continue running load APR0900d. Finish ACIS-S observation of NGC 1569, OBSID 782. Then ACIS-S observations of gravitationally lensed quasar MITG J2019+1127, OBSID 429; the cooling flow cluster Abell 2029, OBSID 891; and the young energetic radio pulsar PSR B1757-24, OBSID 753; followed by perigee passage. Next Contacts 102:16:25 to 18:25 102:23:50 to 01:00 103:09:20 to 11:20 103:19:50 to 21:50 104:06:20 to 07:20 104:15:25 to 16:50 EVENTS Status at LOS, 102:08:29 was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 67.669 deg DEC = 64.840 deg ROLL = 306.325 deg Format = 2 OBSID = 782 (NCG 1569) SIM FA = -467 SIM TSC = 75624 (ACIS-S) HETG = OUT (80.2 deg) LETG = OUT (78.7 deg) HRC-S HV is ON EPHIN: A-Leak = 0.4240 mu-a B-Leak = 0.0680 mu-a 16:27 AOS Having severe problems getting a steady data flow. Status at AOS was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 67.671 deg DEC = 64.844 deg ROLL = 306.323 deg Format = 2 OBSID = 782 (NCG 1569) SIM FA = -467 SIM TSC = 75624 (ACIS-S) HETG = OUT (80.2 deg) LETG = OUT (78.7 deg) HRC-S HV is ON EPHIN: A-Leak = 0.4240 mu-a B-Leak = 0.0680 mu-a Ascending through 143032 km. ACIS focal plane temperature -119.9 deg C. 17:03 Drop to 148KHz, locking telemetry and getting data. But will not have time to complete the SSR dump at this data rate! 17:55 ACIS focal plane holding at -119.9 deg C. NOTES/ISSUES/PROBLEMS The Chandra snapshot was restarted yesterday. D. Morris verified that the ACE fluence history has been kept up to date. From the 9am status meeting: Three passes, 3 good SSR dumps. Uplinked slot 129 -- on-board command load good through 105:11:20. DSN contact time has been obtained Saturday, 106:22:20 to 107:02:30 GMT (6:20 to 10:30 pm EDT Saturday) for the next ACIS squeegy tests. The command loads will be modified to remove the ACIS commands for the exit CTI on day 106 at ~ 23:30 (except the stop science at day 107:02:19) and to extend the comm pass to match the new DSN schedule times. The data from day 097, intervals 00:37 to 07:32, and 08:49 to 15:22, which was reported "missing" in the shift report L262 yesterday, is now said to be LOST. [And that was subsequently confirmed via email.] This time was all within the Sequence number 700105, OBSID 433, ACIS-S/HETG observation of MCG-6-30-15. Assuming (and CXC DS will have to confirm tomorrow) the remaining scheduled time of 61.5 Ksec of data received is actually good, then 63.5 Ksec of the original 125Ksec observation needs to be rescheduled. (It was said that DSN overwrote the storage media, by mistake of course. New procedures will have the OCC query DSN whenever data has not been received within 6 hours. This previously was not done because the requirement is a 24 hour delivery.) Routine CAPs are being prepared to update the on-board ephemeris, and to perform the EIA sequencer test. Quick look data: OBSID 819, ACIS-S observation of the BAL quasar UM 425, looks good. OBSID 426, ACIS-S/HETG TOO observation of Cyg X-3, looks good. OBSID 82, ACIS-S of luminous supersoft 1E 0056.8-7154, looks good. OBSID 610, ACIS-S/HETG observation of Zeta Ori, looks good. ACIS pmon on malang was restarted when data receipt was established. ------------------------------------------------------- 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 -------------------------------------------------------