MTA Monitoring Report 06/25/04 - 07/01/04

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A probable ACIS anomaly has been discovered in obsid 5008, an ACIS-I observation of MACS1115.2+5320 on day 174:20:49. The observation was scheduled for 26.9 ks, but ACIS stopped after 18.6 ks with a science report error message SMTERM_FEP_IO_ERROR. This is under investigation by the ACIS team. The FEP reset normally for the next observation, and ACIS has apparently operated flawlessly since that time. Peter Ford reports that the ACIS DPA current dropped at the time the obsid 5008 data taking ceased with the message: "SMTERM_FEP_IO_ERROR," thereby confirming that the FEP were indeed reset. This is the only case in the mission of a FEP reset without a well understood cause. -- Dan Schwartz (SOT Shift Report 07/01,07/02)

Radiation

The observing schedule was interrupted following a high radiation event at 3:05pm (EDT) on on Jun 29 that stopped the daily load and activated the science instrument safing sequence (SCS 107). The event occurred just prior to radiation belt entry and was caused by electrons contaminating the EPHIN's lowest energy proton channel. The loads were re-planned and science was re-started at radiation belt exit on Jun 30. In order to maintain a safe EPHIN operating temperature, the originally scheduled targets NGC3132 and F1300-2556 were dropped in the re-plan and the target GX 17+2 was inserted. - Mike Juda (CXO Status Report)

OBSIDS affected: 4514,4775
Lost science time: 0.8 ks

Detrended CTI

From Feb 2004, we report CTIs with a refined data definition. CTIs were computed for the data taken during the focal plane temperature ≤ -119.7 C, and the integration time longer than 7,000 sec. This eliminates a CTI temperature dependency, and the shows CTI degradation with time much more cleanly. Please see new CTI page for detailed explanation.

Average of ACIS-I CCDs (MnKa) slope 6.422e-9 CTI/day
Detrended slope 6.989e-9 CTI/day

ACIS Warm Pixels

We display all bad pixels showed up in past, and, if any, previously unknown bad pixels appeared in the last 14 days. We also list hot pixels (defined as 1000 above the average of bias background). Warm columns 509-514 are probably due to a computational artificial effect due to boundaries.


ACIS Focal Plane Temperature

For this period, 2 peaks are observed.

SIM Movements

11 TSC moves this period
weekly average time/step 0.00143 s
mission average time/step 0.00136 s

Telemetry

IRUs


Recent Observations

"Prob" means that there was probably bad time data included in the manual runs. This will probably be corrected in future AP processing.

OBSID DETECTOR GRATING TARGET ANALYSIS ACA
4548 ACIS-S NONE RXJ1718.4-4029 OK OK
5169 ACIS-S HETG 3C273 OK /Grat OK
4642 ACIS-S NONE SN1988Z OK OK
4744 ACIS-I NONE NGC55 OK OK
4157 ACIS-S NONE 3C 78 OK OK
4992 ACIS-I NONE Abell 4038 OK OK
4829 ACIS-S NONE LBQS 0010-0012 OK OK
4703 ACIS-S NONE SCULPTOR DWARF SPHEROIDAL OK OK
4651 ACIS-S NONE G344.7-0.1 OK OK
4561 ACIS-S NONE XTE J1751-305 OK OK
5330 ACIS-S LETG PG 1211+143 OK /Grat OK
4586 ACIS-S NONE 4U1755-33 OK OK

Trending

This Week's focus is HRMA THERMAL.

Trends last reported on Apr 08.

Only the most interesting or representative msids are shown below. For a full listing choose the bulletted link.