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Operations CXO Status Report

Friday 13 September 2013 9.00am EDT

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

Chandra passed through the nineteenth, twentieth, and twenty-first (and final) eclipses of the season on Sep 6, 9, and 12 respectively, with nominal power and thermal performance. Real-time procedures were executed on Sep 12 to disable SCS-29 and to dump and clear the EPS glitch counters as post-eclipse season actions.

A real-time procedure was executed on Sep 6 to turn-off Fine Sun-Sensor A (FSS-A) and Sensor Processing Electronics B (SPE-B). FSS-A and SPE-B had been left powered on since the swap to using FSS-B for routine operations on May 10 in order to allow for additional monitoring of FSS-A performance. At this time adequate data have been collected to be confident of the use of FSS-A for safe-mode operation.

A real-time procedure was used to monitor the momentum unload that was executed from the on-board command loads on Sep 6; the unload performance was nominal.

The schedule of targets for the next week is shown below and includes an observation of GRB130831A, which was accepted as a Director's Discretionary Time TOO on Sep 9, observations of SN 2012ca and SN 2013ej, which were accepted as a Targets of Opportunity on Aug 14 and Sep 4 respectively, and an observation of SN 2012ca coordinated with Spitzer.

        PSRJ0633+1746          ACIS-I       Sep 16
        ArLac (5 obs)          HRC-I
        ArLac (4 obs)          HRC-S
        ArLac (4 obs)          HRC-I
        ArLac (4 obs)          HRC-S
        ArLac (4 obs)          HRC-I
        GRB130831A             ACIS-S       Sep 17
        Radiation Belts
        SN2012ca               ACIS-S
        ArLac (5 obs)          HRC-S
        ArLac (4 obs)          HRC-I        Sep 18
        ArLac (4 obs)          HRC-S
        ArLac (4 obs)          HRC-I
        ArLac (4 obs)          HRC-S
        G121.11+57.01          ACIS-I
        TCha                   ACIS-S/HETG
        G311.5-0.3             ACIS-I       Sep 19
        TCha                   ACIS-S/HETG
        Radiation Belts                     Sep 20
        SgrA*                  ACIS-S
        PSRJ0633+1746          ACIS-I
        SN2013ej               ACIS-S       Sep 21
        HE0435-1223            ACIS-S
        HAE63                  ACIS-S       Sep 22
        PSZ226                 ACIS-I


All spacecraft subsystems continued to support nominal operations.

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