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Operations CXO Status Report

Friday 10 November 2017 9.00am EDT

The Chandra plan of observations released last week will be interrupted tomorrow to incorporate an observation of SwiftJ0243.6+6124, which was accepted as a Director's Discretionary Time Target of Opportunity on Nov 8. A scheduled observation of CDWFS was impacted by the replan and will be rescheduled in a future week.

A real-time procedure was executed on Nov 8 to uplink a flight software patch that increases the HRMA strut maximum temperature thermal health-check threshold. This update is in response to increasing temperatures due to degradation of the Observatory's thermal covers during the mission and will reduce the possibility of an unnecessary swap to redundant thermal control hardware due to environmental heating. Additional real-time procedures were executed on Nov 8-9 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.

A Chandra image release was issued on Nov 6 describing observations of Jupiter coordinated with the Juno mission. New X-ray observations show the auroras on Jupiter behave differently at each pole. The X-ray emission at Jupiter's south pole consistently pulsed every 11 minutes, but the X-rays seen from the north pole were erratic, increasing and decreasing in brightness — seemingly independent of the emission from the south pole. For details see:

The schedule of targets for the next week is shown below and includes an observation of HD 13831 which is coordinated with the VLA, an observation of SN2017gas, which was accepted as a Target of Opportunity on Oct 23 and is coordinated with NuStar, observations of Uranus which were accepted as a Director's Discretionary Time Target of Opportunity on Oct 29 and are coordinated with Hubble, the VLT and Gemini, and an observation of Swift J0243.6+6124, which was accepted as a Director's Discretionary Time Target of Opportunity on Nov 8.

        Radiation Belts
        NGC1275                ACIS-S/HETG
        SwiftJ0243.6+6124      ACIS-S/HETG  Nov 11
        Uranus                 HRC-I
        CDWFS                  ACIS-I
        Uranus                 HRC-I        Nov 12
        CDWFS                  ACIS-I
        Radiation Belts                     Nov 13
        SN2017gas              ACIS-S
        ACT-CLJ0154.4-0321     ACIS-I
        SPT-CLJ2355-5156       ACIS-I       Nov 14
        NGC6482                ACIS-S
        HD13831                ACIS-S
        MACSJ0451.9+0006       ACIS-I
        NGC3221                ACIS-I       Nov 15
        HZ43                   HRC-I /LETG
        PS11ad                 ACIS-S
        Radiation Belts                     Nov 16
        HZ43                   HRC-S /LETG
        XXL-N0058              ACIS-S
        NGC2243                ACIS-S
        RXJ1131-1231           ACIS-S       Nov 17
        Tycho'sSupernovaRe     ACIS-S/HETG
        XXL-N0339              ACIS-S
        Radiation Belts                     Nov 18
        A1795                  ACIS-S
        Tycho'sSupernovaRe     ACIS-S/HETG  Nov 19


All spacecraft subsystems continued to support nominal operations.

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