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Operations CXO Status Report

Friday 4 April 2025 9.00am EDT

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

A real-time procedure was executed on Mar 29 to uplink a flight software patch that returned functionality to the Attitude Error/ Rate Error safing monitor while in Normal Sun Mode. This monitor was previously disabled in Normal Sun Mode due to incompatibility with offset pitch angles. Additional real-time procedures were executed on Mar 29, 30, and 31 to dump OBC-A and -B memory as a follow-up to the patch. The dump will be used to update the baseline memory images maintained on the ground.

Further real-time procedures were executed on Apr 2 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).

A Chandra press release was issued on Mar 31 announcing the selection of 24 new Fellows for the NASA Hubble Fellowship Program (NHFP). The program enables outstanding postdoctoral scientists to pursue independent research in any area of NASA Astrophysics, using theory, observation, experimentation, or instrument development. Each fellowship provides the awardee with up to three years of support. The Space Telescope Science Institute administers the NHFP on behalf of NASA, in collaboration with the Chandra X-ray Center and the NASA Exoplanet Science Institute. For details, see: https://chandra.harvard.edu/press/25_releases/press_033125.html

The schedule of targets for the next week is shown below and includes an observation of M84, which was accepted as a Director's Discretionary Time Target of Opportunity on Feb 3 and is coordinated with EHT.



------------------------------------------
        SN2001em               HRC-I        Apr  7
        M84                    ACIS-S
        UGC7408                ACIS-I
        Radiation Belts                     Apr  8
        PSRJ0633+0632          ACIS-I
        NGC4731                ACIS-S
        NGC0685                ACIS-S
        NGC4731                ACIS-S
        NGC0685                ACIS-S       Apr  9
        NGC4731                ACIS-S
        NGC0685                ACIS-S
        NGC4731                ACIS-S
        UGC9511                ACIS-S       Apr 10
        Radiation Belts
        IGRJ17188-3008         ACIS-S
        CTS117                 ACIS-S
        RCrA                   ACIS-I       Apr 11
        SextansA               ACIS-S
        eRASSUJ130821.3+130    ACIS-S
        1eRASSJ132500.6+123    ACIS-S
        B2.22207+29            ACIS-S
        NGC6537                HRC-I        Apr 12
        1eRASSJ135925.2-113    ACIS-S
        NGC3059                ACIS-S
        PSRJ1101-6101          ACIS-I
        Radiation Belts                     Apr 13
        CentaurusA             ACIS-I
        NGC7713                ACIS-I
        SextansA               ACIS-S

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

All spacecraft subsystems continued to support nominal operations.

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