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Operations CXO Status Report

Friday 19 September 2014 9.00am EDT

During the last week the radiation environment recovered enough following the high-radiation event of Sep 12 to resume operations. A replanned schedule for resuming science observations was uplinked on Sep 13 with 88.0ks of science loss. The replanned schedule is shown below and includes a time-constrained observation of Eta Carinae. Observations of 3C292, 3C277, and SDSS J111729.22+6140 were impacted by the interruption will be rescheduled in future weeks.

        30Doradus              ACIS-I       Sep 13
        UGC12491               ACIS-S
        Radiation Belts                     Sep 14
        3C220.3                ACIS-S       Sep 15
        2XMMJ141711.0+52254    ACIS-S
        EtaCarinae             ACIS-S
        ArLac (21 obs)         HRC-I        Sep 16
        ArLac (21 obs)         HRC-S
        M31BHXNe               ACIS-I
        Q0000-263              ACIS-S
        G296.41-32.48          ACIS-I       Sep 17
        Radiation Belts
        G106.73-83.22          ACIS-I
        SN1987A                ACIS-S/HETG
        ESO153-G003            ACIS-S       Sep 18
        RXJ1324.7-5736         ACIS-S
        HD93030                ACIS-S/HETG  Sep 19
        NGC7717                ACIS-S
        Radiation Belts
        SN1987A                ACIS-S/HETG  Sep 20
        NGC682                 ACIS-S

Since resumption Chandra has completed the observing schedule as planned.

A real-time procedure was executed on Sep 12 to disable SCS-29, which
was enabled during the safing sequence.

A real-time procedure was executed on Sep 15 to temporarily turn on
the ACIS detector assembly housing heater, to verify whether a cold
ACIS focal plane is possible with the heater on. The heater has been
off since 2008 Apr 7. The heater was turned off via commands in the
daily command loads on Sep 16.

A Chandra press release was issued on Sep 16 as a NASA press release
describing observations of WASP-18, a giant planet that appears to be
weakening the magnetic field of the star it closely orbits. WASP-18 is
over ten times Jupiter's mass but is so close to its star that it
completes an orbit in less than a day. The extreme tidal forces by
this "hot Jupiter" are apparently changing the internal structure of
the star. Chandra data show the star is acting much older than the age
astronomers estimate it to be. For details see:

The schedule of targets for the next two weeks is shown below and
includes observations of GRB140903A and IGR J17451-3022, which were
accepted as a Targets of Opportunity on Sep 8 and 16 respectively.

        47Tuc                  ACIS-S       Sep 21
        GRB140903A             ACIS-S
        SDSSJ230703.75+0113    ACIS-S       Sep 22
        Radiation Belts
        ChandraDeepField-S     ACIS-I       Sep 23
        PSRJ1509-5850nebul     ACIS-I
        WR122                  ACIS-I       Sep 24
        SDSSJ230703.75+0113    ACIS-S
        Radiation Belts                     Sep 25
        ChandraDeepField-S     ACIS-I
        3C34                   ACIS-S
        3C247                  ACIS-S       Sep 26
        Abell2256              ACIS-I
        Abell2345              ACIS-I
        ACT-CL_J2154-0049      ACIS-I
        Radiation Belts                     Sep 27
        ChandraDeepField-S     ACIS-I       Sep 28
        NGC682                 ACIS-S
        IGRJ11014-6103         ACIS-I       Sep 29
        IGRJ17451-3022         HRC-S
        RXJ1856.5-3754         ACIS-S/LETG
        HD93030                ACIS-S/HETG
        Radiation Belts                     Sep 30
        47Tuc                  ACIS-S
        ChandraDeepField-S     ACIS-I       Oct  1
        IGRJ11014-6103         ACIS-I
        47Tuc                  ACIS-S       Oct  2
        IGRJ11014-6103         ACIS-I
        ChandraDeepField-S     ACIS-I
        Radiation Belts                     Oct  3
        ChandraDeepField-S     ACIS-I
        NGC682                 ACIS-S       Oct  4
        J002434.9+325842       ACIS-S
        HD206267               ACIS-S/HETG  Oct  5


All spacecraft subsystems continued to support nominal operations.

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