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Operations CXO Status Report

Friday 7 August 2020 9.00am EDT

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

Real-time procedures were executed on Aug 1 to swap the prime solid-state recorder (SSR) from the A-side to the B-side. This swap concludes a six-month interval of health and trending data collection on SSR-A. Other real-time procedures were executed on Aug 1 and Aug 2 to dump OBC-A and -B memory as a follow-up to the patches uplinked on Jul 30-31. The dumps will be used to update the baseline memory images maintained on the ground. Real-time procedures were executed on Aug 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).

Additional real-time procedures were executed during each ground contact to reset the DSN Outage Dead Man Load.

Chandra press and image releases were issued on Aug 3 featuring Chandra observations of the galaxy cluster SpARCS104922.6+564032.5 (SpARCS1049 for short) located about 9.9 billion light years away from Earth, combined with observations from NASA's Hubble Space Telescope and Spitzer Space Telescope. Stars are seen to be forming at an extraordinary rate of about 900 new Suns worth of mass per year in SpARCS1049, and in a region outside of the cluster galaxies. This burst of star formation is attributed to an inactive supermassive black hole in the central galaxy, which would otherwise inject sufficient energy into its surroundings to limit star formation. For details, see:

The schedule of targets for the next week is shown below and includes an observation of AT2019wxt, which is a follow-up to a Target of Opportunity accepted on Mar 10, observations of Hercules X-1, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 20 and is coordinated with XMM and NuSTAR, and an observation of Betelgeuse, which is a follow-up to a Director's Discretionary Time Target of Opportunity accepted on Jan 29.

        2MASXJ20442214-0957    ACIS-S       Aug 10
        SDSS_J135225.80+1328   ACIS-S
        G32.4+0.1              ACIS-I
        NGC4839                ACIS-I
        Radiation Belts                     Aug 11
        G32.4+0.1              ACIS-I
        herculesx-1            ACIS-S/HETG  Aug 12
        MASTERJ2022+0746       ACIS-S
        MRC1929-397            ACIS-S
        Spiderweb              ACIS-S       Aug 13
        MRC1929-397            ACIS-S
        MACSJ2020.8-3002       ACIS-I
        Radiation Belts                     Aug 14
        2RXSJ200008.7+07453    ACIS-S
        herculesx-1            ACIS-S/HETG
        SDSSJ1233+4512         ACIS-S
        RBS797                 ACIS-S
        Betelgeuse             HRC-I        Aug 15
        Q0000-263              ACIS-S
        SPT-CLJ2205-2956       ACIS-I
        AT2019wxt              ACIS-S       Aug 16
        SPT-CLJ2205-2956       ACIS-I
        Radiation Belts


All spacecraft subsystems continued to support nominal operations.

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