To:sot_shift from: Dan Schwartz date: 30 Apr 01, 12:00noon EDT Subject: SOT shift report 2001-04-30 L648 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_30_2001_L648.txt. Shift L648. Start at 120:12:00 GMT = 08:00am 30 Apr EDT End 12:00 noon 30 Apr SOT Lead DAS (Times will be given in GMT on day 120.) PLAN ---- Continue running load APR2901A. (This load replaces APR3001B.) Running OBSID 2227, an ACIS-I observation of RX J0910+5422, as part of a complete sample of 8 clusters of galaxies at redshift Z>0.8. No Comm this shift. Next Comms: 120:17:00 to 19:00 121:03:00 to 04:00 121:10:15 to 11:15 121:16:05 to 21:30 OTG software patch testing 122:05:30 to 06:30 122:15:00 to 16:00 123:00:00 to 01:00 123:09:00 to 10:00 Orbital events: 2001:121:13:56:47.734 239 EPERIGEE ORBIT PERIGEE 2001:122:21:40:04.571 240 EAPOGEE ORBIT APOGEE 2001:124:05:24:14.175 240 EPERIGEE ORBIT PERIGEE 2001:125:13:07:36.076 241 EAPOGEE ORBIT APOGEE 2001:126:20:50:42.256 241 EPERIGEE ORBIT PERIGEE 2001:128:04:34:46.596 242 EAPOGEE ORBIT APOGEE 2001:129:12:18:01.609 242 EPERIGEE ORBIT PERIGEE 2001:130:20:02:04.274 243 EAPOGEE ORBIT APOGEE EVENTS ------ Status at LOS, 120:09:29, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 137.653 deg Dec = 54.360 deg ROLL = 252.635 deg Format = 2 OBSID = 914 RX J0910+5422 SIM FA = -535 SIM TSC = 89719 (ACIS-I) HETG = OUT (79.84 deg) LETG = OUT (78.34 deg) HRC-S HV is ON EPHIN Geom = LARG E1300 = 0.0 LT 10.0 (RADMON P4GM = 0.4 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 0.2200 mu-a Descending through 139433 km. ACIS focal plane temperature -119.9. NOTES/ISSUES/PROBLEMS From the 9am status meeting: Over the weekend, 9 supports, all SSR data was dumped, 3 load segments uplinked, on-board loads good to 123:19:00. Ran CAPs 593, to activate SCS 107 at 118:04:52 (early Saturday morning), due to high radiation levels. Ran CAP 722 to perform a gyro hold, to avoid the fact that the attitude at which we ran SCS 107 scanned within 6 degrees of the earth limb. Ran CAP 675 to re-enable SCS 107, when the loads were resumed at 119:04:40 in order to pick up with OBSID 2227. The rebuilt loads are called APR2901A, and incorporate and supersede the APR3001B loads. May0701A products are out, and the first load review will be today at 2pm. This load will need continuity rerun due to the reconstituted APR2901A load. Only 2 arcsec of attitude error built up during the 3 hour gyro hold. Stars were not actually lost despite being within 6 deg of the earth. There will be a CAP review at 2:30pm today, for the OTG patch. Call 405-244-5060 1165#. An unanticipated failure of psicorp at 8:20pm Friday night caused lack of realtime data via the SOT snapshot. The incident was that psicorp was "comatose" rather than a hard failure, so automatic switchovers did not occur. When this was recognized, the hot backup systems worked as planned, until psicorp was restored to prime ~4pm Sunday. DSOPS has an action to dry-run procedures whenever configurations change. In the present case, this was actually done in-so-far as was deemed reasonable, since it is not desired to force psicorp off-line when not necessary. The web page version of snapshot had been restored. The text version of snapshot, in /pool14, was still not working as of start of shift, but has now been repaired and shows correct data. In an unrelated incident, ASVT data was erroneously passed to the CXCDS about 18:06EDT Sunday, causing a false alarm indication of a bright star hold mode. The false alarm was immediately recognized by the incorrect day of year reported. GOT has a action to review procedures, to assess how data may be properly passed to CXCDS even when ASVT data is flowing. GOT should also review how to check that ASVT data is not flowing, instead of assuming it is or is not present. GOT will take the database server offline from 0800--1300EDT on Thursday May 3rd, for backups and training. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 1959 SN1006 NW 116:16:45 ACIS-S Looks good. 2315 RCW103 117:18:14 ACIS-I Looks good. 2169 2MASSJ151653+1900 117:19:52 ACIS-I No obvious source 2143 1641+399 117:20:37 ACIS-S Looks good 2145 1928+738 117:23:38 ACIS-S Looks good 2042 ARP 270 118:03:09 ACIS-S Looks good. Only a partial obs, 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 -------------------------------------------------------