News by Date
News by Category
Solar System
White Dwarfs
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Galaxy Clusters
Cosmology/Deep Field
Press Resources
Status Reports
Press Advisories
Image Releases
Release Guidelines
Image Use Policy
Web Shortcuts
Chandra Blog
RSS Feed
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Chandra @ NASA
Visit the Chandra pages at the NASA portal (opens in new window)
Image Use
Image Use Policy & Request Form
Guidelines for utilizing images, applets, movies, and animations featured in this Web Site.
Operations CXO Status Report

Friday 17 March 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 7:37am EDT on Mar 15 through a ground command to execute the SI Safing SCS 107. This ensured that the accumulated radiation dose for ACIS remained below the allowed threshold. All spacecraft actions were nominal.

A replanned schedule for resuming science observations was uplinked on Mar 16 with 83ks of science loss. Planned observations impacted by the interruption will be rescheduled.

Following the real-time procedure executed on Mar 10 to patch SCS31 to use Fine Sun Sensor B in safe mode, real-time procedures were executed on Mar 10, Mar 11, and Mar 12 to dump OBC-A and -B memory. The dump will be used to update the baseline memory images maintained on the ground.

Additional real-time procedures were executed on Mar 16 to assess the health of the MUPS-B thrusters prior to returning them to service. MUPS-B1, B3, and B4 were tested, with nominal results. Follow-up real-time procedures were executed on Mar 17 to return to the mixed-MUPS thruster configuration and enable autonomous momentum unloading on the OBC.

Chandra passed through the 6th, 7th, and 8th eclipses of the season on Mar 10, Mar 13, and Mar 16 respectively, with nominal power and thermal performance.

Of note this week, the Chandra Cycle 25 proposal deadline was Mar 15 at 6pm EDT.

The schedule of targets for the next week is shown below and includes an observation of Terzan 5, which was accepted as a Director's Discretionary Time Target of Opportunity on Mar 1, observations of SDSSJ142135.90+52313, which were accepted as Targets of Opportunity on Feb 23, an observation of WISEAJ045649.8-2037, which was accepted as a Director's Discretionary Time Target of Opportunity on Mar 2, observations of AT2020ywx coordinated with VLA, an observation of SDSSJ094533.99+1009 coordinated with the Hobby Eberly Telescope, and an observation of SDSSJ110409.96+4345 coordinated with the Hobby Eberly Telescope.

        ESO338-4               ACIS-I       Mar 17
        MOOJ1506+5137          ACIS-I
        A1367orphancloud       ACIS-S
        JWST-DTDF-1            ACIS-I
        A1367orphancloud       ACIS-S       Mar 18
        PSZ2G041.45+29.10      ACIS-I
        Terzan5                ACIS-S
        SDSSJ125150.45+1143    ACIS-S
        Radiation Belts                     Mar 19
        DELSJ091054.53-0414    ACIS-I
        SDSSJ035150.97-0613    ACIS-S
        SDSSJ094533.99+1009    ACIS-S
        SDSSJ110409.96+4345    ACIS-S
        SDSSJ110810.87+0141    ACIS-S
        WISEAJ045649.8-2037    ACIS-S
        IRAS09104+4109         ACIS-S       Mar 20
        SDSSJ110042.60+05500   ACIS-S
        B2.30516+40            ACIS-S
        AT2020ywx              ACIS-S
        SDSSJ142135.90+52313   ACIS-S       Mar 21
        Radiation Belts
        E0102-72.3             ACIS-S       Mar 22
        GW170817               ACIS-S
        E0102-72.3             ACIS-S
        GW170817               ACIS-S
        E0102-72.3             ACIS-S
        GW170817               ACIS-S
        E0102-72.3             ACIS-S
        GW170817               ACIS-S       Mar 23
        E0102-72.3             ACIS-S
        SDSSJ120452.89-03262   ACIS-S
        E0102-72.3             ACIS-I
        AT2020ywx              ACIS-S
        Radiation Belts                     Mar 24
        NGC4255                ACIS-S
        VCC1175                ACIS-S
        SDSSJ142135.90+52313   ACIS-S
        Radiation Belts                     Mar 25
        SDSSJ114907.15+0041    ACIS-S
        SDSSJ142135.90+52313   ACIS-S
        NGC6540                ACIS-S
        SDSSJ145020.08+02324   ACIS-S
        SDSSJ1339+1310         ACIS-S
        NGC6540                ACIS-S
        SDSSJ1339+1310         ACIS-S
        PSZ2G078.67+20.06      ACIS-I       Mar 26
        [PLP2016]188.073826    ACIS-S
        PSZ2G078.67+20.06      ACIS-I
        [PLP2016]188.073826    ACIS-S
        Radiation Belts                     Mar 27
        E0102-72.3             ACIS-I


All spacecraft subsystems except HRC continued to support nominal operations.

Return to Status Reports