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Operations CXO Status Report

Friday 21 January 2022 9.00am EST

During the last week Chandra's observing schedule was interrupted by a reset of the ACIS watchdog timer at 2022:016:05:23z. This reset the ACIS flight software to the original version, making ACIS data of non-scientific quality. CAPs were run on Jan 16 to manually activate SCS 107 to stop the science loads and safe the science instruments, to disable SCS 29, and to verify the ACIS patchlist and restart ACIS. Observations were resumed on Jan 18 at 1900z. Scheduled observations that were impacted by the anomaly will be rescheduled in future weeks. A total of 173.5 ks of science time was lost due to the anomaly.

The schedule of targets for the next week includes observations of 47 Tuc, which was accepted as a Director's Discretionary Time Target of Opportunity on Dec 10 and is coordinated with ATCA.



------------------------------------------
        SN2014C                ACIS-S       Jan 24
        SDSSJ090531.07+03353   ACIS-S
        Hoinga                 HRC-I
        Radiation Belts                     Jan 25
        CentaurusA             ACIS-S/HETG
        CasA                   ACIS-I
        PSOJ135.3860+16.251    ACIS-S
        SDSSJ090313.09+4824    ACIS-S       Jan 26
        47Tuc                  ACIS-S
        Hoinga                 HRC-I
        SDSSJ081855.77+09584   ACIS-S
        47Tuc                  ACIS-S
        SDSSJ090051.03+0109    ACIS-S       Jan 27
        Mrk54                  ACIS-S
        Radiation Belts
        V346Nor                ACIS-I
        SDSSJ082508.75+1155    ACIS-S       Jan 28
        PSZ2G215.61+22.61      ACIS-I
        A2319                  ACIS-I
        IRAS09104+4109         ACIS-S
        SDSSJ102040.61+09225   ACIS-S
        V346Nor                ACIS-I
        IRAS09104+4109         ACIS-S       Jan 29
        Mrk54                  ACIS-S
        SDSSJ094140.17+32570   ACIS-S
        LP791-18               ACIS-S
        Radiation Belts                     Jan 30

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

All spacecraft subsystems continued to support nominal operations.

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