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Operations CXO Status Report

Friday 9 December 2005 9.00am EST

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

Of note this week was the decision to increase the projected maximum temperature allowed in mission planing of the EPHIN radiation detector from 96F to 110F. The new limit was adopted to relax increasingly tight mission planning thermal constraints at normal sun attitudes. The new limit will result in an increased number of EPHIN 27 volt rail drops, however following review, this has been assessed as acceptable by the engineering team and EPHIN PI.

A Chandra press release was issued on Dec 1 describing observations of the Perseus galaxy cluster that show evidence of energetic plumes extending 300,000 light years into the massive cluster. The plumes, due to explosive venting from the vicinity of a supermassive black hole, provide new evidence of the influence a black hole over intergalactic distances. For further details see: http://chandra.harvard.edu/press/05_releases/press_120105.html

The schedule of targets for next week is shown below.

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SDSSJ0812+4018 ACIS-S Dec 11 SN 2005gj ACIS-S NGC 5253 ACIS-S Dec 12 15 Mon ACIS-S/HETG Radiation Belts Dec 13 RX J0720.4-3125 HRC-S/LETG DLS J1359-1055 ACIS-I Dec 14 1RXS J205334.0-063 ACIS-S Q2130-431 ACIS-S IRAS05436-0007 ACIS-I NGC6872 ACIS-I SDSS J210757.67-06 ACIS-S Dec 15 DG Tau ACIS-S RX J0720.4-3125 HRC-S/LETG Radiation Belts RX J0720.4-3125 HRC-S/LETG Dec 16 NGC6872 ACIS-I DG Tau ACIS-S Dec 17 IRAS03359+1523 ACIS-S RX J0720.4-3125 HRC-S/LETG NGC 2500 ACIS-S Q2131-437 ACIS-S Q2122-444 ACIS-S NGC 7090 ACIS-S Dec 18

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All spacecraft subsystems continued to support nominal operations.

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