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Operations CXO Status Report

Friday 3 January 2025 9.00am EST

During the last week the observing schedule was interrupted due to high radiation associated with solar activity. The loads were halted at 12:17pm EST on Dec 31 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. Real-time procedures were executed on Dec 31 and Jan 1 to disable SCS-29, which was enabled during the safing sequence, and to change the ObsID. Loads for a replanned schedule were uplinked on Jan 2. Planned observations that were impacted by the interruption will be rescheduled.

The Operations Control Center (OCC) was impacted on Dec 29 by a failure of the chiller which provides cooling for the core network and server equipment at the OCC. The resulted in the loss of commanding capability for one communication pass and a rollover of the Solid State Recorder. There was no spacecraft impact or loss of data. Temporary cooling units were put in place to provide nominal cooling, and on Jan 2 the chiller was returned to service.

The schedule of targets for the next week is shown below and includes observations of NGC 5548 and NGC 3783 coordinated with XMM-Newton, an observation of 3C 273 coordinated with XMM-Newton and NuSTAR, an observation of SDSS J021340.14-050149.1, which was accepted as a Target of Opportunity on Dec 10, and an observation of SN2023fyq, which was accepted as a Director's Discretionary Time Target of Opportunity on Dec 23.



------------------------------------------
        OrionNebulaCluster     ACIS-I       Jan  3
        NGC5548                HRC-S /LETG
        1eRASSJ012710.5-285    ACIS-S
        OrionNebulaCluster     ACIS-I
        IC1574                 ACIS-I
        NGC1977point           ACIS-I
        2MASSJ22445794-3315    ACIS-S       Jan  4
        NGC1977point           ACIS-I
        2RXSJ004445.0-22002    ACIS-S
        NGC1977point           ACIS-I
        M87                    HRC-I
        NGC1977point           ACIS-I
        Radiation Belts                     Jan  5
        PerseusclusterE        ACIS-I
        UGC3752                ACIS-S
        NGC5548                HRC-S /LETG  Jan  6
        QSOB0824+110           ACIS-S
        PG1553+113             ACIS-I
        3C273                  ACIS-S/HETG
        ZwCl0857.9+2107        ACIS-S       Jan  7
        PG1553+113             ACIS-I
        ZwCl0857.9+2107        ACIS-S
        PG1553+113             ACIS-I
        ZwCl0857.9+2107        ACIS-S
        Radiation Belts                     Jan  8
        SN2023fyq              ACIS-S
        ZwCl0857.9+2107        ACIS-S
        NGC5548                HRC-S /LETG
        ZwCl0857.9+2107        ACIS-S
        NGC5530                ACIS-S       Jan  9
        ZwCl0857.9+2107        ACIS-S
        NGC5530                ACIS-S
        ZwCl0857.9+2107        ACIS-S
        NGC5530                ACIS-S
        ZwCl0857.9+2107        ACIS-S
        NGC5530                ACIS-S
        ZwCl0857.9+2107        ACIS-S       Jan 10
        NGC5530                ACIS-S
        ZwCl0857.9+2107        ACIS-S
        Radiation Belts
        CGCG081-001            ACIS-S       Jan 11
        SDSSJ075147.71+24535   ACIS-S
        NGC5548                HRC-S /LETG
        1eRASSJ112803.5+310    ACIS-S
        SDSSJ021340.14-0501    ACIS-S
        PSZ2G162.33+25.03      ACIS-I
        NGC5548                HRC-S /LETG  Jan 12
        Abell795               ACIS-S
        FRB20220914A           ACIS-S
        GaiaDR267500740681     ACIS-S
        SN1941C                HRC-I
        Abell795               ACIS-S
        Radiation Belts                     Jan 13

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All spacecraft subsystems continued to support nominal operations.

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