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Operations CXO Status Report

Friday 24 February 2023 9.00am EST

During the last week Chandra completed the maneuver-only observing schedule as planned following the recovery from safe mode.

Real-time procedures were executed on Feb 17-18 to complete the recovery from safe mode and maneuver to a cooling attitude. Following this a set of maneuver-only loads were uplinked in order to manage momentum and thermal in preparation for the return to science loads.

Additional real-time procedures were executed on Feb 18-20 to dump OBC-A and -B memory as a follow-up to the patch applied during safe mode recovery. The dump will be used to update the baseline memory images maintained on the ground.

Additional real-time procedures were executed on Feb 23, one to open the MUPS-B iso valve and one to execute an ACIS external calibration source measurement.

A Chandra press release was issued on Feb 22 describing observations where NASA’s Chandra X-ray Observatory helped identify two pairs of dwarf galaxies on track to merge. Dwarf galaxies, which are at least about 20 times less massive than the Milky Way, likely formed larger galaxies through collisions in the early Universe. These newly-discovered merging dwarf galaxies can be used as analogs for more distant ones that are too faint to observe. The dwarf galaxies are on collision courses and are found in the galaxy clusters Abell 133 and Abell 1758S. For details see:

The schedule of targets for the next week is shown below and includes an observation of AT2022cmc, which was accepted as a Target of Opportunity on Jan 6 and an observation of DGPS J172051.4-374340, which was accepted as a Target of Opportunity on Oct 12.

        Radiation Belts                     Feb 24
        UGC5745                ACIS-S
        DGPSJ172051.4-37434    ACIS-I
        AT2022cmc              ACIS-S
        B2.41512+23            ACIS-S       Feb 25
        IRAS15205+5021         ACIS-S
        Radiation Belts
        UGC05027               ACIS-S       Feb 26
        CLJ044629.6-175958     ACIS-I
        DELSJ091054.53-0414    ACIS-I
        2RXSJ043740.6+52534    ACIS-S       Feb 27
        JWST-DTDF-1            ACIS-I
        SDSSJ110428.48+11561   ACIS-S
        JWST-DTDF-1            ACIS-I
        Radiation Belts                     Feb 28
        GW170817               ACIS-S
        SPT-CLJ0240-5946       ACIS-I       Mar  1
        DELSJ091054.53-0414    ACIS-I
        SPT-CLJ0354-5904       ACIS-I
        GW170817               ACIS-S
        SDSSJ161358.56+3931    ACIS-S
        QSOJ1016+2037          ACIS-S
        IRAS15205+5021         ACIS-S       Mar  2
        QSOJ1016+2037          ACIS-S
        PSZ2G075.85+15.53      ACIS-S
        QSOJ1016+2037          ACIS-S
        PSZ2G075.85+15.53      ACIS-S
        Radiation Belts                     Mar  3
        [APH2018]SDSSJ1020     ACIS-I
        A2319                  ACIS-I
        [APH2018]SDSSJ1020     ACIS-I
        2RXSJ053421.8+51273    ACIS-S       Mar  4
        GW170817               ACIS-S
        2RXSJ145923.0-40131    ACIS-S
        NGC5005                ACIS-S
        JWST-DTDF-1            ACIS-I       Mar  5
        DELSJ091054.53-0414    ACIS-I
        Radiation Belts


All spacecraft subsystems except HRC continued to support nominal operations.

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