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Operations CXO Status Report

Friday 9 December 2016 9.00am EST

I am deeply saddened to report the passing on December 3 of our friend and colleague Mike Juda from complications of renal cell carcinoma. He will be dearly missed as a critically important leader in our flight and science teams, serving as lead Flight Director and Mission Operations Manager. Mike will be remembered for his calm and thoughtful presence as a leader and a friend.

During a real-time pass on Dec 9 the ACIS Digital Processing Assembly Side-A (DPA-A) was detected in an unexpected powered-off state. Initial assessment from real-time telemetry indicated behavior consistent with prior cases where the DPA powered-down. In each of those cases a fault-tree analysis concluded the event was due to a single event upset. Analysis of recorder dump data will be done in order to confirm the initial assessment, determine the impact to science observations, and determine the recovery plan.

A real-time procedure was executed on Dec 7 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer.

A Chandra press release was issued on Dec 8 describing observations of SPT 0346-52, a recently-discovered galaxy that is undergoing an extraordinary boom of star formation. The high rate of star formation implies that a large reservoir of cool gas in the galaxy is being converted into stars with unusually high efficiency. The galaxy is 12.7 billion light years from Earth, seen at a critical stage in the evolution of galaxies about a billion years after the Big Bang. For details see:

The schedule of targets for the next week is shown below:

2RXSp190226_2 ACIS-S Dec 11 B30727+409 ACIS-S Radiation Belts Dec 12 B30727+409 ACIS-S CygnusA-Nucleus ACIS-I Dec 13 B30727+409 ACIS-S Dec 14 spog2 ACIS-S NGC4654 ACIS-S PG1302-102 ACIS-S Radiation Belts Dec 15 CygnusA-EHotspot ACIS-I 2MASSJ20403364+1529 ACIS-S Dec 16 4C+18.45 ACIS-S Abell586 ACIS-I 2MASSJ14211512-0107 ACIS-S PS11kj ACIS-S NGC5557 ACIS-S Dec 17 Abell586 ACIS-I Radiation Belts Dec 18 Abell586 ACIS-I NGC4527 ACIS-S 2MASSJ16492028+5101 ACIS-S NGC5493 ACIS-S Abell586 ACIS-I Dec 19


All spacecraft subsystems continued to support nominal operations.

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