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Operations CXO Status Report

Friday 25 February 2022 9.00am EST

During the last week Chandra completed the observing schedule as planned.

A real-time procedure was executed on Feb 17 to patch the flight software in order to disable HRC input to the radiation monitor. Real-time procedures were also run on Feb 18 set up a radiation zone deadman timer and to re-enable the science instrument safing sequence (SCS 107).

Additional real-time procedures were executed on Feb 18-21 to dump OBC-A and -B memory as a follow-up to the patch. The dump will be used to update the baseline memory images maintained on the ground.

The schedule of targets for the next week is shown below and includes observations of SDSS J143016.05+230344.4, which is a follow-up to a Director's Discretionary Time Target of Opportunity accepted on Feb 7.



------------------------------------------
        JWST-DTDF-1            ACIS-I       Feb 27
        CSWA26                 ACIS-S
        SDSSJ105122.46+31074   ACIS-S       Feb 28
        Radiation Belts
        SDSSJ143016.05+2303    ACIS-S
        FermiJ1913+0515        ACIS-I
        3CR250                 ACIS-S
        B2.32334+39            ACIS-S       Mar  1
        CSWA26                 ACIS-S
        FermiJ1913+0515        ACIS-I
        MKN421                 ACIS-S/LETG
        SDSSJ143016.05+2303    ACIS-S       Mar  2
        GX17+2                 ACIS-S/HETG
        MKN421                 ACIS-S/LETG
        GX17+2                 ACIS-S/HETG
        Radiation Belts                     Mar  3
        GX17+2                 ACIS-S/HETG
        MKN421                 ACIS-S/LETG
        SDSSJ143016.05+2303    ACIS-S
        FermiJ1913+0515        ACIS-I
        MKN421                 ACIS-S/LETG
        GDHIdp44               ACIS-I       Mar  4
        GDHIdp44               ACIS-I
        GDHIdp44               ACIS-I
        GDHIdp44               ACIS-I
        MKN421                 ACIS-S/LETG
        MKN421                 ACIS-S/LETG
        GDHIdp44               ACIS-I
        GDHIdp44               ACIS-I
        PSZ2G067.52+34.75      ACIS-I
        PKS1150+497            ACIS-S
        Z535-12                ACIS-S       Mar  5
        PKS1150+497            ACIS-S
        Radiation Belts
        SDSSJ111300.80+14291   ACIS-S
        SDSSJ143016.05+2303    ACIS-S       Mar  6
        WISEAJ171423.60+085    ACIS-S
        CentaurusA             ACIS-I
        DESJ040559.80-33085    ACIS-S
        SDSSJ094043.21+0357    ACIS-S
        DESJ040559.80-33085    ACIS-S

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

The unavailability of the HRC instrument last week prevented nominal operations.

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