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Operations CXO Status Report

Friday 15 September 2017 9.00am EDT

During the last week the observing schedule was interrupted by a high-radiation event that activated the science instrument safing sequence (SCS 107) and stopped observing at 3:51am EDT on Sep 11. All spacecraft actions were nominal. Real-time procedures were executed on Sep 11 to disable SCS-29 which was enabled during the safing sequence, to warm boot ACIS to clear an inappropriate status bit, and to update the observation identifier number to aid CXCDS processing of the interrupted observation. A replanned schedule was uplinked on Sep 13 with 152.3ks of science loss. The replanned schedule included an observation of MAXI J1535-571, a Target of Opportunity which was accepted on Sep 8. Scheduled observations of NGC 1313 X-1, ACT-CL J0154.4-0321, Haro 11, PSR J2055+2539 nebula, M30 and AR Lac were impacted and will be rescheduled.

The schedule of targets for the next week is shown below and includes an observation of NGC1313 X-1 coordinated with NuSTAR.



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CentaurusA ACIS-S Sep 17 M30 ACIS-S Sep 18 Radiation Belt Sep 19 CentaurusA ACIS-S PSRJ2129-0429 ACIS-S Sep 20 Radiation Belt Sep 21 SNR1987A ACIS-S/HETG M30 ACIS-S Sep 22 MOOJ2206+0906 ACIS-I M30 ACIS-S Sep 23 SNR1987A ACIS-S/HETG Radiation Belt Sep 24 NGC1313X-1 ACIS-S/HETG

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All spacecraft subsystems continued to support nominal operations.

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