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Operations CXO Status Report

Friday 5 April 2024 9.00am EDT

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

A real-time procedure was executed on Mar 29 to clear a glitch counter that incremented during eclipse exit on Mar 28. This is a routine event possible following an eclipse.

Additional real-time procedures were executed on Apr 2 to disable SCS-29 and to dump and clear the EPS glitch counters as post-eclipse season actions.

Further real-time procedures were executed on Apr 3 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer and to perform a diagnostic dump of the CPE.

Chandra passed through the 29th and 30th (and final) eclipses of the season on Mar 31 and Apr 2 respectively, with nominal power and thermal performance.

Of note this week was an announcement of the symposium "25 Years of Science with Chandra", to be held in Boston December 3-6, 2024. Also of note was the release on Apr 2 of the Chandra Source Catalog Release 2.1 (The 22-year Source Catalog), which covers roughly 730 square degrees of sky and contains 407,806 unique X-ray sources and 1,304,376 individual source detections identified in 15,533 Chandra ACIS and HRC-I imaging observations released publicly prior to the end of 2021. For details see:

The schedule of targets for the next week is shown below and includes an observation of SDSSJ095023.20+0246 coordinated with HET, observations of M87 coordinated with Event Horizon Telescope and NuSTAR, and observations of SgrA* coordinated with JWST, Event Horizon Telescope, and NuSTAR.

        Radiation Belts                     Apr  7
        SgrA*                  ACIS-S
        SDSSJ090646.98+1740    ACIS-S
        M87                    ACIS-S
        M87                    ACIS-S
        SDSSJ075136.36+4327    ACIS-S
        SDSSJ085149.58+42471   ACIS-S
        HD115247               HRC-S /LETG
        WISEAJ214505.18+634    ACIS-S       Apr  9
        SgrA*                  ACIS-S
        HE1338-1423            HRC-S /LETG
        LMCDeepField05         ACIS-I
        GW170817               ACIS-S
        LMCDeepField03         ACIS-I       Apr 10
        GW170817               ACIS-S
        Radiation Belts
        SDSSJ092002.85+0544    ACIS-S
        WHLJ112126.4+534457    ACIS-I       Apr 11
        HE1338-1423            HRC-S /LETG
        A2384                  ACIS-I
        2MASXJ13292099-2110    ACIS-I       Apr 12
        LMCDeepField03         ACIS-I
        HE1338-1423            HRC-S /LETG
        A2384                  ACIS-I
        SDSSJ141215.60-0037    ACIS-S
        LEDA-36252             ACIS-S
        SDSSJ095023.20+0246    ACIS-S
        ACT-CLJ0947.9-0120     ACIS-S
        Radiation Belts                     Apr 13
        SDSSJ091930.31+11085   ACIS-S
        SDSSJ130002.91-01060   ACIS-S
        SDSSJ074521.78+47343   ACIS-S
        SDSSJ125519.69+01441   ACIS-S       Apr 14
        SDSSJ074521.78+47343   ACIS-S
        LEDA-36252             ACIS-S
        PSOJ172.3556+18.773    ACIS-S
        SDSSJ092855.53+33224   ACIS-S


All spacecraft subsystems continued to support nominal operations.

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