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Operations CXO Status Report

Friday 4 November 2005 9.00am EST

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

Chandra passed through a short duration lunar eclipse on Nov 1 with nominal power and thermal performance. The eclipse duration was 26 min 11 sec and with a maximum occultation of 44%. The solar array voltages were within the predicted range on eclipse exit. A real-time procedure was completed following the eclipse to reset on-board eclipse flag to 'medium' in preparation for the next Earth eclipse season in January.

A Chandra press release was issued on Nov 2 describing observations of the star cluster Westerlund 1 that have led to the discovery of a neutron star in the cluster, rather than a predicted intermediate mass black hole. The discovery may severely limit the range of stellar masses that lead to the formation of stellar black holes. For details see: http://chandra.harvard.edu/press/05_releases/press_110205.html

The schedule of targets for next week is shown below.

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The Crab Nebula ACIS-S/HETG Nov 7 NGC 4312 ACIS-S M84 ACIS-S 3C 33 ACIS-S HD93129AB ACIS-S/HETG Nov 8 NGC 281 ACIS-I Radiation Belts HD93129AB ACIS-S/HETG Nov 9 Abell 193 ACIS-S The Crab Nebula ACIS-S/HETG Nov 10 HD93129AB ACIS-S/HETG The Crab Nebula ACIS-S/HETG NGC 281 ACIS-I Radiation Belts Nov 11 HD93129AB ACIS-S/HETG Nov 12 3C 33 ACIS-S NGC 281 ACIS-I RXJ1856.5-3754 HRC-I Radiation Belts NGC 4569 ACIS-S Nov 13

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All spacecraft subsystems continued to support nominal operations.

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