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Operations CXO Status Report

Friday 28 April 2023 9.00am EDT

During the last week, the observing schedule was interrupted due to high radiation associated with solar activity. The loads were halted at 6:34pm EDT on Apr 23 through a ground command to execute the SI Safing SCS 107. This prevented further exposure to damaging radiation for the ACIS instrument detectors. All spacecraft actions were nominal. Related real-time procedures were executed Apr 24 to update the observation identifier number to aid CXCDS processing and on Apr 27 to re-enable SCS 134. Loads for a replanned schedule were uplinked on Apr 25 with about 77ks of science time lost. Planned observations that were impacted by the interruption will be rescheduled in future weeks.

Chandra passed through the 22nd, 23rd, and 24th eclipses of the season on Apr 22, Apr 25, and Apr 27 respectively, with nominal power and thermal performance.

The schedule of targets for the next week is shown below.



------------------------------------------
        PSRJ1852+0040          ACIS-S       Apr 30
        PSZ2G002.82+39.23      ACIS-I       May  1
        A2029/A2033bridge      ACIS-I
        MASTERJ2126+2538       ACIS-S
        A2029/A2033bridge      ACIS-I
        2MASXJ21161028+25170   ACIS-S
        A2029/A2033bridge      ACIS-I
        B2.42054+22B           ACIS-S
        A2029/A2033bridge      ACIS-I       May  2
        PSRJ1852+0040          ACIS-S
        Radiation Belts                     May  3
        DELSJ091054.53-0414    ACIS-I
        SDSSJ100407.26+61393   ACIS-S
        CasA (8)               ACIS-I
        SDSSJ135908.35+3058    ACIS-S       May  4
        CasA                   ACIS-S
        SDSSJ144503.63+36374   ACIS-S
        CasA                   ACIS-S
        ACT-CLJ1521.1+0451     ACIS-S
        4C+23.56               ACIS-S
        ACT-CLJ1521.1+0451     ACIS-S
        NGC4586                ACIS-S       May  5
        PROCYON                HRC-I
        DELSJ091054.53-0414    ACIS-I
        Radiation Belts
        DELSJ091054.53-0414    ACIS-I
        A1795                  ACIS-I       May  6
        ALPHACEN               HRC-I
        DELSJ091054.53-0414    ACIS-I
        [MOK2016b]HSCJ1423     ACIS-S       May  7
        SDSSJ100212.63+5208    ACIS-S
        SNRG021.5-00.9         HRC-S
        A1068                  ACIS-S
        Radiation Belts                     May  8

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

All spacecraft subsystems continued to support nominal operations.

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