To:sot_shift from: Dan Schwartz date: 22 Jun 00 , 12:00noon EDT Subject: SOT shift report, Shift L335 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jun_22_2000_L335.txt. Shift L335. Start at 174:12:00 GMT = 08:00am 22 Jun EDT End 12:00 noon 22 Jun SOT Lead DAS (Times will be given in GMT on day 174. In general times are rough, not precise.) PLAN Continue running load JUN1800c. Finish a series of HRC timing calibrations on the pulsar PSR B0540-69. Then do OBSID 925, ACIS-I of the Einstein medium survey cluster MS 1006.0+1202; OBSID 618, ACIS-I of the star forming region in Ophiucus; and OBSID 713, ACIS-S of CEN X-4 in quiescence. These are followed by CTI measurements surrounding a perigee passage. Next Comms: 174:20:30 to 22:30 175:06:30 to 07:30 175:15:30 to 17:30 176:01:30 to 02:30 176:10:30 to 11:30 176:19:30 to 20:30 177:04:30 to 05:30 177:13:25 to 14:55 178:00:15 to 01:15 EVENTS No comm during this shift. Status at LOS, 174:11:43, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 85.120 deg DEC = -69.321 deg ROLL = 174.160 deg Format = 1 OBSID = 1745 (PSR B0540-69) SIM FA = -990 SIM TSC = -99616 (HRC-S) HETG = OUT (80.2 deg) LETG = OUT (78.3 deg) HRC-S HV is ON EPHIN: A-Leak = 0.5040 mu-a B-Leak = 0.0800 mu-a Descending through 139501 km. ACIS focal plane temperature -119.9 NOTES/ISSUES/PROBLEMS From the 9am status meeting: A problem with DSS-24 at the 174:03:00 contact prevented dumping of SSR. Subsequent DSS-24 contact at 174:10:45 went well, about 2/3 of SSR was dumped leaving a modest backlog which is expected to be easily cleared up. The final load segment for JUN1800c was uplinked, we are good until 177:22:20. Second review of JUN2500 went well. Some star and momentum dump updates are needed, but will not require an additional full team review. Rino has noted that the ACIS focal plane is taking a longer time, ~4 1/2 hrs, to cool down on the ascent from perigee passage. This is the behavior expected for the orientation of the orbit at this time of year. There will be a meeting at 3pm today to review the products for manual insertion and retraction of HETG to support the PKS 1830-211 observation next week. Next Tuesday will be an OCC on-site meeting including MSFC, EKC, and TRW/west to review the HETG limit switch failures and plan short/medium term workarounds via real-time and ATS changes, and plan the long term changes to OBC software which will also accomodate future potential failures. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 882 NGC 4395 172:02:19 ACIS-S Looks good. 297 M31 - North 2 173:04:07 HRC-I Looks good 285 M31 - North 1 173:04:33 HRC-I Looks good 273 M31 - CENTER 173:04:58 HRC-I Looks good 261 M31 - South 1 173:05:23 HRC-I Looks good 249 M31 - South 2 173:05:48 HRC-I Looks good ------------------------------------------------------- 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 -------------------------------------------------------