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Operations CXO Status Report

Friday 20 September 2013 9.00am EDT

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

A flight software patch was uplinked on Sep 19 that disables the capability for the MUPS-B2 thruster firing, to prevent the risk of a stuck open thruster. Real-time procedures were executed on Sep 19 and 20 to dump OBC-A memory as a follow-up to the patches. The dump will be used to update the baseline memory image maintained on the ground.

A real-time procedure was used to monitor the momentum unload that was executed from the on-board command loads on Sep 17; the unload performance was nominal.

A Chandra image release was issued on Sep 19 describing observations of the Coma cluster of galaxies. Galaxies clusters are the largest structures in the Universe held together by gravity. Long arms of hot gas been discovered in the Coma cluster of galaxies; these arms span at least a half a million light years. These arms were likely formed by hot gas being stripped and left behind smaller clusters of galaxies as they merged with Coma. For details see: http://chandra.si.edu/photo/2013/coma/

The schedule of targets for the next week is shown below and includes observations of SDSS J0908+4441 and SDSS J2222-0946 coordinated with the Hobby-Eberly Telescope.



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Radiation Belts Sep 22 G062.42-46.41 ACIS-I IGRJ17091-3624 ACIS-S/HETG Sep 23 SDSSJ0908+4441 ACIS-S TCha ACIS-S/HETG SwiftJ132150.9-6333 ACIS-S Sep 24 Radiation Belts Sep 25 DeepField11 ACIS-I GJ3253 ACIS-S G171.94-40.65 ACIS-I Sep 26 XMM01 ACIS-S SDSSJ2222-0946 ACIS-S Sep 27 M31BHXN ACIS-I SuzakuJ2226+6047 ACIS-S Radiation Belts SN1987A ACIS-S/HETG Sep 28 BD+371977 HRC-I Sep 29 SN2008en ACIS-S G062.42-46.41 ACIS-I

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All spacecraft subsystems continued to support nominal operations.

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