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Operations CXO Status Report

Friday 1 May 2009 9.00am EDT

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

A real-time procedure was conducted on 28 April to uplink a flight software patch to update the telescope secondary thermal data base. The update allows for the contingency situation of the spacecraft being in prolonged Normal Sun Mode attitude prior to a short eclipse. The update enables an increased power-drain on the batteries to prevent an over-voltage condition on short-eclipse exit.

A Chandra image release was issued on 29 April of a region near the center of our Galaxy. This deep observation has resolved a long-standing mystery about the X-ray glow along the plane of the Galaxy. The glow in the region covered by the Chandra image was discovered to be caused by hundreds of point-like X- ray sources, implying that the glow along the plane of the Galaxy is due to millions of such sources. For detail see:

The schedule of targets for the next week is shown below and includes an observation of IM Lup coordinated with the VLT.

Radiation Belts May 3 SPT-CL0547-5345 ACIS-I May 4 IM Lup ACIS-S/HETG Radiation Belts May 6 1834+612 ACIS-S May 7 3C326 ACIS-I cl0334-3900 ACIS-I CepBsub-cluster ACIS-I V454Cepsub-cluster ACIS-I May 8 NGC1961 (2 obs) ACIS-I Radiation Belts May 9 GRB090423 ACIS-S 3C326 ACIS-I May 10 CSS080928 ACIS-S Cas A ACIS-I Cas A ACIS-S Vega HRC-I Vega (3 obs) HRC-S GRB090423 ACIS-S NGC1961 (2 obs) ACIS-I GRB090417B ACIS-S May 11


All spacecraft subsystems continued to support nominal operations.

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