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Operations CXO Status Report

Friday 5 September 2025 9.00am EDT

During the last week the observing schedule was interrupted due to high radiation associated with solar activity. The loads were halted at 5:09pm EDT on Sep 1 through a ground command to execute the SI Safing SCS 107. This prevented further exposure to damaging radiation for the ACIS instrument detectors. All spacecraft actions were nominal. A further real-time procedure was executed on Sep 1 to disable SCS-29, which was enabled during the safing sequence. Loads for a replanned schedule were uplinked on Sep 2. Planned observations impacted by the interruption will be rescheduled.

Additional real-time procedures were executed on Sep 3 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer and to perform a diagnostic dump of the Control Processing Electronics (CPE).

The schedule of targets for the next week is shown below and includes an observation of Jupiter coordinated with HST, and an observation of EP250630b, which was accepted as a Director's Discretionary Time Target of Opportunity on Sep 3.



------------------------------------------
        WISEJ2246-0526         ACIS-S       Sep  7
        Radiation Belts                     Sep  8
        PerseusCluster         ACIS-I
        SN2003gk               HRC-I
        VVPup                  ACIS-S/HETG
        Abell370               ACIS-I       Sep  9
        HD286085               HRC-I
        SDSSJ165243.49+3922    ACIS-S
        WISEJ2246-0526         ACIS-S
        VVPup                  ACIS-S/HETG  Sep 10
        EP250630b              HRC-I
        Abell3017              ACIS-S
        Radiation Belts                     Sep 11
        WISEJ2246-0526         ACIS-S
        SDSSJ161517.25+3058    ACIS-S
        WASP-69                HRC-I
        NGC2566                ACIS-S
        NGC1385                ACIS-S       Sep 12
        HEPG330.811-00.347     ACIS-I
        WASP-69                HRC-I        Sep 13
        SDSSJ224655.57-08425   ACIS-S
        Radiation Belts
        NGC2566                ACIS-S
        WISEJ025942.86-1635    ACIS-S       Sep 14
        NGC2110                ACIS-S/HETG
        RMJ233641.3-012723.7   ACIS-I
        Jupiter                HRC-S

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

All spacecraft subsystems continued to support nominal operations.

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