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Operations CXO Status Report

Friday 29 April 2016 9.00am EDT

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

Real-time procedures were executed on Apr 23, 24, 25 and 27 to turn off the on-board ranging drive function during communications contacts with the Deep-Space Network ground station DSS-54. This action is taken to collect additional characterization data on this station's performance, in order to understand the cause for regular instances of dropped telemetry frames when using this station

A Chandra press release was issued on Apr 28 describing how researchers are using a large sample of galaxy cluster to investigate dark energy. The details of X-ray emission from over 300 galaxy clusters were obtained with Chandra. The galaxy clusters range in distance from about 760 million to 8.7 billion light years from Earth. The study shows that dark energy has not changed over billions of years. For details see: http://chandra.si.edu/press/16_releases/press_042816.html

The schedule of targets for the next week is shown below



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LBQS1235+1453 ACIS-S May 2 SwiftJ202313+2042.7 ACIS-S fcc143 ACIS-S RYLup ACIS-S/HETG 3XMMJ130323.9-63480 ACIS-S May 3 BootesCy17-12 (2 obs) ACIS-I Radiation Belts May 4 UGC11185 ACIS-S SN2014C ACIS-S May 5 RYLup ACIS-S/HETG NGC4206 ACIS-S May 6 Mkn876 ACIS-S/HETG BootesCy17-12 ACIS-I Radiation Belts May 7 Mkn876 ACIS-S/HETG 1H0419-577 ACIS-S RYLup ACIS-S/HETG 1H0419-577 ACIS-S May 8 SDSSJ121911.16+0429 ACIS-S NGC4725 ACIS-I May 9 Radiation Belts

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All spacecraft subsystems continued to support nominal operations.

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