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Operations CXO Status Report

Friday 7 January 2005 9.00am EST

Happy New Year from the Chandra team.

During the last two weeks Chandra completed the observing schedule as planned.

The IEPHIN instrument exhibited two cases of anomalous behavior during the last two weeks during periods of elevated operating temperature. The power supply voltage dropped as it became current limited due to the high temperature and returned to its nominal value once the unit cooled following a maneuver to a new attitude. An adjustment will be made to the thermal threshold used during mission planning in order to reduce the number of future occurrences.

A Chandra press release was made on Jan 5 describing observations of the galaxy cluster MS 0735.6+7421 that indicate enormous eruptions from the central supermassive black hole that have produced associated cavities or bubbles. The eruptions are considered the most powerful ever observed. For details see: http://chandra.harvard.edu/press/05_releases/press_010505.html

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

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mu Aur ACIS-I Jan 9 M3 ACIS-S SDSS J1048+4637 ACIS-S M1-92 ACIS-S cl1120+4318 ACIS-I Jan 10 Radiation Belts E0102-72 (3 obs) ACIS-I Jan 11 NGC 45 ACIS-S CXOU J061705.3+222 ACIS-S HCG 37 ACIS-S Jan 12 SNR1987A ACIS-S NGC 45 ACIS-S IGR J00291+5934 ACIS-S Radiation Belts HCG 97 ACIS-S Jan 13 CXOMP J084128.3+1311 ACIS-S SDSS 0903+5028 ACIS-S NGC 45 ACIS-S Jan 15

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All spacecraft subsystems continued to support nominal operations.

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