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Operations CXO Status Report

Friday 5 August 2005 7.00am EDT

Last week the observing schedule was halted due to high radiation associated with solar flare activity. The loads were halted on Aug 1 at 8:16pm EDT through a ground command to execute the SI Safing SCS 107. This ensured that the accumulated radiation dose for ACIS remained below the allowed threshold. Loads were restarted at 12:00am EDT on Aug 3. Observations of Sgr A*, IRAS05436-0007 and PKS 1030-357 were impacted by the event (total 76.3 Ks).

A real time procedure was completed on Aug 4 to disable SCS 29 as a clean-up action to the SCS 107 run on Apr 1.

The schedule of targets for the next week is shown below and includes 2 observations of the Coronet Cluster coordinated with the VLA and an observation of V4046 Sgr coordinated with HST.

------------------------------------------
SDSS J235831.16-00      ACIS-S       Aug 7
Coronet Cluster         ACIS-I
HZ43                    HRC-I/LETG   Aug 8
Radiation Belts
Coronet Cluster         ACIS-I
V4046 Sgr               ACIS-S/HETG  Aug 9
HD 184905               ACIS-S
Coronet Cluster         ACIS-I
Abell 1650              ACIS-I       Aug 10
PSS2322+1944            ACIS-S
Radiation Belts
Abell 1650              ACIS-I       Aug 11
Coronet Cluster         ACIS-I
SS 433                  ACIS-S/HETG  Aug 12
SMCwing 13              ACIS-I
Coronet Cluster         ACIS-I
Abell 1650              ACIS-I       Aug 13
Radiation Belts
M81*                    ACIS-S/HETG  Aug 14
GRB050724               ACIS-S

------------------------------------------

All spacecraft subsystems continued to support nominal operations.

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