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Operations CXO Status Report

Friday 16 January 2026 9.00am EST

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

Preparations were completed for the winter 2026 eclipse season; the season contains 13 eclipses and runs from Jan 13 to Feb 13. Real-time procedures were executed on Jan 12 to prepare for the first eclipse: one to activate SCS 29 and one to dump and clear the EPS glitch counters. Chandra passed through the 1st and 2nd eclipses of the season on Jan 13 and 16 respectively, with nominal power and thermal performance.

The schedule of targets for the next week is shown below and includes observations of GRB260114A, which was accepted as a Target of Opportunity on Jan 15, and observations of SN2025sei, which are follow-ups to a Target of Opportunity accepted on Aug 11.



------------------------------------------
        NGC5728                ACIS-S       Jan 19
        Abell795               ACIS-S
        NGC5728                ACIS-S
        NGC4694                ACIS-S
        Abell795               ACIS-S
        SN2025sei              ACIS-S
        Abell795               ACIS-S       Jan 20
        BOSS0210W              ACIS-I
        GRB260114A             ACIS-S
        Radiation Belts                     Jan 21
        SDSSJ093401.24+2453    ACIS-S
        SN2025sei              ACIS-S
        NGC4941                ACIS-S
        ZwCl0857.9+2107        ACIS-S       Jan 22
        SN2025sei              ACIS-S
        MKN421                 ACIS-S/LETG
        SDSSJ014837.63+0600    ACIS-I
        MKN421                 ACIS-S/LETG
        SDSSJ014837.63+0600    ACIS-I       Jan 23
        ZwCl0857.9+2107        ACIS-S
        SN2025sei              ACIS-S
        Radiation Belts                     Jan 24
        NGC4496A               ACIS-S
        UGC05086               ACIS-I
        SN2025sei              ACIS-S
        PSRJ1101-6101          ACIS-I
        ZwCl0857.9+2107        ACIS-S       Jan 25
        NGC5728                ACIS-S
        GRB260114A             ACIS-S

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

All spacecraft subsystems except HRC-S continued to support nominal operations.

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