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Operations CXO Status Report

Friday 7 August 2026 9.00am EDT

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

A real-time procedure was executed on Jul 31 to swap the prime solid-state recorder (SSR) from the B-side to the A-side. This swap concludes a six-month interval of health and trending data collection on SSR-B.

Additional real-time procedures were executed on Aug 4 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer and to perform a diagnostic dump of the Control Processing Electronics (CPE).

Chandra passed through the 6th and 7th eclipses of the season on Aug 2 and 4 respectively, with nominal power and thermal performance.

The schedule of targets for the next week is shown below and includes an observation of EP J223759.5+531421, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 14, and an observation of TDE 2025aarm, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 28.



------------------------------------------
        Radiation Belts                     Aug 10
        SDSSJ125354.49+2624    ACIS-S
        PSOJ308.0416-21.233    ACIS-S
        2RXSJ161659.7-31363    ACIS-S
        NGC1358                ACIS-S       Aug 11
        NGC1358                ACIS-S
        2MASXJ22373491-1925    ACIS-S
        PerseusclusterN        ACIS-I
        SDSSJ220153.56-08344   ACIS-S       Aug 12
        PerseusclusterN        ACIS-I
        2MASXJ22373491-1925    ACIS-S
        Radiation Belts                     Aug 13
        PerseusclusterS        ACIS-I
        2MASXJ22373491-1925    ACIS-S
        PerseusclusterS        ACIS-I
        2MASXJ22373491-1925    ACIS-S       Aug 14
        TDE2025aarm            ACIS-S
        SDSSJ222203.73-09271   ACIS-S
        PerseusclusterS        ACIS-I
        PSOJ308.0416-21.233    ACIS-S       Aug 15
        Radiation Belts
        PerseusclusterS        ACIS-I
        Mrk915                 ACIS-S       Aug 16
        EPJ223759.5+531421     ACIS-S
        PerseusclusterN        ACIS-I
        NGC424                 ACIS-S

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

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

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