Operations CXO Status Report

Friday 24 January 2025 9.00am EST

Operations CXO Status Report, 24 Jan 2025, 9.00am EST During the last week Chandra completed the observing schedule as planned. A real-time procedure was executed on Jan 24 to re-enable all MUPS thrusters in Normal Sun Mode. Previously only the cool-side thrusters (3 and 4) had been initially enabled. The update enables the hot-side thrusters (1 and 2) after a 2 hour cool down period at 160 degrees solar pitch angle and reduces the risk of an ineffective momentum auto-unload. Chandra passed through the second, third, and fourth eclipses of the season on Jan 18, 21, and 23, respectively, with nominal power and thermal performance. The schedule of targets for the next week is shown below, and includes an observation of EP250108a, which was accepted as a Director's Discretionary Time Target of Opportunity on Jan 17.

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        Radiation Belts                     Jan 26
        UGC9511                ACIS-S
        ZwCl0857.9+2107        ACIS-S       Jan 27
        2MASXJ17353371+2047    ACIS-S
        ZwCl0857.9+2107        ACIS-S
        PSZ2G060.13+11.44      ACIS-I
        ZwCl0857.9+2107        ACIS-S
        PSZ2G060.13+11.44      ACIS-I       Jan 28
        Abell370               ACIS-I
        ZwCl0857.9+2107        ACIS-S
        PSZ2G060.13+11.44      ACIS-I
        DQTauperiastron1       ACIS-I
        EP250108a              ACIS-S
        Radiation Belts                     Jan 29
        NGC244                 ACIS-S
        DQTauperiastron1       ACIS-I
        PSZ2G192.18+56.12      ACIS-I
        A1795                  ACIS-S
        DQTauperiastron1       ACIS-I
        Abell370               ACIS-I
        DQTauperiastron1       ACIS-I       Jan 30
        ZwCl0857.9+2107        ACIS-S
        PSZ2G060.13+11.44      ACIS-I
        DQTauperiastron1       ACIS-I
        ZwCl0857.9+2107        ACIS-S
        Abell370               ACIS-I
        DQTauperiastron1       ACIS-I       Jan 31
        PSZ2G178.94+56.00      ACIS-I
        Abell370               ACIS-I
        DQTauperiastron1       ACIS-I
        SN2016bkv              HRC-I
        DQTauperiastron1       ACIS-I
        Radiation Belts                     Feb  1
        SextansA               ACIS-S
        Abell370               ACIS-I
        SextansA               ACIS-S
        2RXSJ150456.5+18303    ACIS-S
        ZwCl0857.9+2107        ACIS-S       Feb  2
        UGC7242                ACIS-I
        NVSSJ151148-105023     ACIS-S
        SextansA               ACIS-S

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Use of the LETG is suspended pending a detailed review of the Jan 11 grating insertion anomaly. All other spacecraft subsystems continued to support nominal operations.

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