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Operations CXO Status Report

Friday 24 May 2013 9.00am EDT

During the last week Chandra the observing schedule was interrupted by a high-radiation event that activated the science instrument safing sequence (SCS 107) and stopped observing at 10:49am on May 22. All spacecraft actions were nominal. Real-time procedures were executed on May 22 to disable SCS-29, which was enabled during the safing sequence, and to update the observation identifier number, to aid CXCDS processing of the interrupted observation. A real-time procedure was executed on May 24 to verify that the radiation environment as observed by the HRC anticoincidence shield had decreased to an acceptable level. Loads for a replanned schedule were uplinked on May 24 with 121.9ks of science loss. Observations that were impacted will be rescheduled.

A Chandra press release was issued on May 23 as a NASA press release describing observations of SGR 0418+5729 (SGR 0418 for short), a magnetar that has been shown to have the lowest surface magnetic field ever found for this type of neutron star. For details see:

The schedule of targets for the next week is shown below and includes an observation of 4U 1630-47, which was accepted as a Target of Opportunity on May 20 and is coordinated with the EVLA.

Radiation Belts May 26 G11.2-0.3 ACIS-S 4U1630-47 ACIS-S/HETG May 27 NGC2899 ACIS-S May 28 GROJ1008-57 ACIS-S HD124314 ACIS-I Radiation Belts May 29 PSRB1509-58 ACIS-S NGC5373 ACIS-S May 30 SDSSJ1643+4414 ACIS-S M31Southwest ACIS-S/HETG Radiation Belts Jun 1 COSMOSLegacy ACIS-I G241.77-24.00 ACIS-I COSMOSLegacy ACIS-I M31BHXN ACIS-I Jun 2 HAE281 ACIS-S A1795 ACIS-I


All spacecraft subsystems continued to support nominal operations.

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