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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.

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

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

All spacecraft subsystems continued to support nominal operations.

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