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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.

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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

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All spacecraft subsystems continued to support nominal operations.

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