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Operations CXO Status Report

Friday 6 October 2017 9.00am EDT

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

Two flight software patches were uplinked on Oct 2. The first patch was to update the PCAD constants which affect the gyro bias vector when the PCAD software initializes. The second patch was to update the on-board gyro calibration misalignment matrix. Real-time procedures were executed on Oct 2-4 to dump OBC-A and OBC-B memory as a follow-up to the patches. The dump will be used to update the baseline memory image maintained on the ground.

A Chandra press release was issued on Oct 3 describing observations of five pairs of merging supermassive black holes. Though models predict such growing binary black holes, relatively few have been found. Both the X-ray data from Chandra and the infrared WISE observations suggest that the supermassive black holes are buried in large amounts of dust and gas. For details see: http://chandra.harvard.edu/photo/2017/doubleagn/

The schedule of targets for the next week is shown below and includes an observation of R Aqr coordinated with HST.



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Abell2597 ACIS-S Oct 8 Radiation Belts Oct 9 1E1207.4-5209 ACIS-S J132844.05+435550.5 ACIS-S RAqr ACIS-S Oct 11 G352.015+0.705 ACIS-I SDSSJ083332.92+16441 ACIS-S Oct 12 Radiation Belts G352.557+0.744 ACIS-I Oct 13 RAqr ACIS-S G352.841+0.720 ACIS-I Oct 14 NGC5660 ACIS-S Radiation Belts Oct 15

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All spacecraft subsystems continued to support nominal operations.

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