Chandra Press Room :: Operations CXO Status Reports

Operations CXO Status Report

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.

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        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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Revised: July 08, 2022