Operations CXO Status Report

Friday 7 February 2025 9.00am EST

During the last week Chandra completed the observing schedule as planned. A real-time procedure was executed on Feb 1 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 Feb 5 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 seventh, eighth, and ninth eclipses of the season on Jan 31, Feb 3, and 6, respectively, with nominal power and thermal performance. Also of note this week was the release on Jan 31 of CALDB 4.12.0, which updates the ACIS response matrices for warmer operations and includes an update to the HRC-S uniformity data set. For details see: https://cxc.cfa.harvard.edu/caldb/downloads/Release_notes/CALDB_v4.12.0.html The schedule of targets for the next week is shown below.

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        NGC5134                ACIS-S       Feb 10
        CenterofCOSMOS-Web     ACIS-I
        eRASSUJ174858.8-510    ACIS-S
        NGC5134                ACIS-S
        Mrk34                  ACIS-S
        PSOJ170.8326+20.208    ACIS-S       Feb 11
        Radiation Belts
        Trumpler3              ACIS-I
        SDSSJ092040.44+1920    ACIS-S
        SN2002ap               HRC-I
        Mrk34                  ACIS-S       Feb 12
        eRASSUJ033307.7-105    ACIS-S
        Abell754               ACIS-I
        Abell370               ACIS-I
        Abell754               ACIS-I       Feb 13
        NGC2090                ACIS-S
        DQTauperiastron2       ACIS-I
        PSOJ170.8326+20.208    ACIS-S
        Radiation Belts                     Feb 14
        DQTauperiastron2       ACIS-I
        SDSSJ025455.54+0006    ACIS-S
        Trumpler3              ACIS-I
        DQTauperiastron2       ACIS-I
        CenterofCOSMOS-Web     ACIS-I
        Abell370               ACIS-I
        DQTauperiastron2       ACIS-I       Feb 15
        HD75332                HRC-I
        Trumpler3              ACIS-I
        DQTauperiastron2       ACIS-I
        1eRASSJ020203.7-282    ACIS-S
        CenterofCOSMOS-Web     ACIS-I
        Abell370               ACIS-I
        DQTauperiastron2       ACIS-I
        CenterofCOSMOS-Web     ACIS-I
        Abell370               ACIS-I
        DQTauperiastron2       ACIS-I       Feb 16
        Abell754               ACIS-I
        Abell370               ACIS-I
        DQTauperiastron2       ACIS-I
        Radiation Belts

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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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