To:sot_shift from: Dan Schwartz date: 20 May 05, 12:00noon EDT Subject: SOT shift report 2005-05-20 L2129 -------- See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/web-cxc/htdocs/acis/SOT_reports/May_20_2005_L2129.txt. Shift L2129. Start at 140:13:00 GMT = 08:00am 20 May EDT End 10:00am 20 May SOT Lead DAS (Times will be given in GMT on day 140.) PLAN ---- Continue running load MAY1905B. Doing obsid 5839, a fast HRC-S/LETG ToO observation of the blazar 3C 454.3 in outburst, in order to detect absorption by baryons in the local intergalactic medium. Then into perigee passage tomorrow. During that long HRC-S observation, do an ACIS focal plane cooling test. Next Comms: 140:2200 to 2300 141:0430 to 0530 141:1320 to 1420 141:2000 to 2100 142:0345 to 0445 142:1145 to 1245 142:1845 to 1945 143:0345 to 0445 143:1515 to 1615 Orbital events: 2005:140:02:15:58.092 799 EAPOGEE ORBIT APOGEE 2005:141:09:59:43.942 799 EPERIGEE ORBIT PERIGEE 2005:142:17:42:58.816 800 EAPOGEE ORBIT APOGEE 2005:144:01:27:04.955 800 EPERIGEE ORBIT PERIGEE EVENTS ------ Status at AOS, 140:11:48, was as follows: PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 343.509 deg Dec = 16.125 deg ROLL = 94.995 deg Format = 2 OBSID = 5839 3C 454.3 SIM FA = -990 SIM TSC = -99616 (HRC-S) DITHER = ENAB HETG = OUT (79.09 deg) LETG = IN ( 4.09 deg) HRC-S HV is ON EPHIN Geom = SMAL E150 = 3134.1 E300 = 28.2 E1300 = 1.5 LT 10.0 (RADMON P4GM = 0.3 LT 300. Triggers) P41GM = 0.0 LT 8.47 A-leak = 1.0200 mu-a B-leak = 1.0200 mu-a Descending through 118099 km. ACIS focal plane temperature -122.4degC. EPH temp 98.62 degF 12:43 LOS.Status is essentially unchanged. EPHIN continuing to warm. Descending through 116402 km. ACIS focal plane temperature -122.4degC. EPH temp 99.88 degF NOTES/ISSUES/PROBLEMS We are doing an ACIS focal plane cooling test, which is why the temperature is below -120 C. We note that EPHIN is getting hot, as was predicted. We'll expect the current limit trip to lower the 27v supply when the temperature gets to 101 or 102 deg F later in the observation. From the 9am status meeting: Three supports over the past day, no issues. On board loads good through 142:20:25, the end of MAY1905B. MAY2305A products were out yesterday afternoon, for a load review at 10am this morning on 405 244 5060 pin 1165# Some known issues will require B products to be generated. Fid light glitch reported yesterday was said to be a cosmic ray hit in the fid light window, which caused the centroid to shift. An aft bulkhead temperature tripped a limit this morning. ACE soft protons continue to decline. Currently they are just a factor of a few over background. No sign of the Tuesday CME, which might have impacted earth early today. Processing of the X-ray flasher ToO, obsid 5577, took place in record time. Data was delivered to observer 4 hours after receipt by dataops, 13 hours after the end of the obsid on board the spacecraft. Joy thanks everyone for their efforts. There was a construction related water outage yesterday, one may also occur tomorrow. Quick look data: OBSID Target Time Comment ----- ------ -------------- ------- 5444 RXJ0513.9-6951 139:02:26 HRC-S LETG looks good 5577 XRF050509C 139:09:52 ACIS-S NONE looks good, (partial) ------------------------------------------------------- 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 -------------------------------------------------------