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Operations CXO Status Report

Friday 12 December 2003 7.00am EST

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

A real-time procedure was completed on 9 Dec to compare the expected and observed HRC anticoincident shield rates. The procedure was completed as part of planning for the possible use of the HRC as a backup radiation detector.

A Chandra press release was issued on Dec 8 describing an image of the elliptical galaxy NGC 4261 that reveals dozens of black holes and neutron stars strung out across the galaxy. The structure, which is not apparent from the optical image of the galaxy, is thought to be the remains of a collision between galaxies a few billion years ago. For details see:http://chandra.harvard.edu/press/03_releases/press_120803.html .

The observing schedule for the next week is shown below and includes a series of calibration observations of E0102-72, an observation of NGC 5408 coordinated with the VLA, and an observation of the Earth during which Chandra will be aimed at a fixed point and the Earth's polar cusp will drift through the HRC-I field of view.

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Radiation Belts Dec 14 E0102-72 (7 obs) ACIS-S Dec 15 E0102-72 ACIS-I Earth HRC-I PMN J0324-2918 ACIS-S Dec 16 LBQS 2111-4335 ACIS-S PKS2155-304 ACIS-S/LETG E0102-72 (2 obs) ACIS-I Radiation Belts CLASS B0712+472 ACIS-S Dec 17 F1610-1418 ACIS-S Dec 18 E0102-72 (5 obs) ACIS-I Radiation Belts Dec 19 B3 1614+473 ACIS-S Dec 20 HZ43 HRC-I/LETG NGC 5408 ULX ACIS-S HZ43 HRC-S/LETG W 135 ACIS-S H2106-099 HRC-S/LETG E0102-72 ACIS-I Dec 22

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All spacecraft subsystems continued to support nominal operations.

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