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Operations CXO Status Report

Friday 10 January 2014 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 3:39pm on Jan 7. All spacecraft actions were nominal. Real-time procedures were executed on Jan 8 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 Jan 9 to start a collection of ACIS CCD charge-transfer inefficiency data. Planning efforts for the resumption of the observing schedule are on-going and observing will resume once the radiation environment settles. Observations that were impacted by the interruption will be rescheduled.

A real-time procedure was executed on Jan 8 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer.

A Chandra press release was issued on Jan 8 describing a bright flare seen with Chandra that provides evidence for a black hole having torn a star apart. This may be the first such recorded event in a dwarf galaxy, a much smaller galaxy than the Milky Way. The dwarf galaxy is located in a galaxy cluster about 800 million light years from Earth. For details see:

All spacecraft subsystems continued to support nominal operations.

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