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Operations CXO Status Report

Friday 20 May 2005 8.00am EDT

During the last week the observing schedule was interrupted following a high radiation event at 9:24am EDT on May 14 that stopped the daily load and activated the science instrument safing sequence (SCS 107). All actions were nominal and radiation levels dropped sufficiently to for the loads to be restarted at 4.30pm on May 15. The observations of GX 339-4 and the high redshift blazar TOO were impacted (total 96.3Ks).

The schedule was replanned once more to include an observation of XRF050509C that was accepted as a fast turn around TOO on May 16. The replan also allowed the inclusion the high redshift blazar TOO impacted by the solar event. Observations of IGR J16207-5129, RXJ1856.5-3754, Westerlund1, MACS1720.3+3536 were impacted by the replan and will be rescheduled in a later load.

The schedule of targets for the next week is shown below and includes two observations of M81 coordinated with ground observatories.

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Westerlund1 ACIS-S May 22 G15.9+0.2 ACIS-S 2007+777 ACIS-S May 23 Radiation Belts GD356 ACIS-S May 24 NGC6407 ACIS-S NGC 6656 ACIS-S G15.9+0.2 ACIS-S Hercules A ACIS-S PKS2155-304 ACIS-S/LETG May 25 M81 ACIS-S Radiation Belts May 26 M32 ACIS-S G15.9+0.2 ACIS-S May 28 cl0030+2618 ACIS-I M81 ACIS-S Radiation Belts HD 179949 ACIS-S May 29 M87 ACIS-S

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All spacecraft subsystems continued to support nominal operations.

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