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Operations CXO Status Report

Friday 17 June 2005 9.00am EDT

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

A real-time procedure was completed on Jun 10 to reinitialize the flight software Thruster Command Processing subfunction to clear a benign overflow condition.

A real-time procedure was completed on Jun 13 to backout the two most recent flight software patches, the SCS107/84 and RadMon patches. This follows the identification of an incorrect memory value used in the RadMon patch discovered during a code comparison conducted as part of the present re-compile activity. A number of process improvements have been identified and approved as a result of the problem, and a corrected patch has been generated, tested and approved for uplink.

Of note last week was the release of CXCDS 7.6 in support of the Cycle 7 Peer Review that will be held in Boston next week.

A Chandra press release was made on Jun 6 describing the discovery of a shell of superheated gas around a dying star in the Milky Way galaxy. A stunning image release was issued on Jun 13 of the supernova remnant Cas-A that combines Chandra, Hubble and Spitzer data. For details see:
http://chandra.harvard.edu/press/05_releases/press_060605.html http://chandra.harvard.edu/photo/2005/casa

The schedule of targets for the next week is shown below and includes an observation of 1H1426+428 coordinated with XMM-Newton, and a series of observations of M81 coordinated with ground observations.

------------------------------------------
NGC 821                ACIS-S       Jun 20
SAX J1808.4-3658       HRC-I
M87                    ACIS-S
AX J1040.3+2045        ACIS-S
M81                    ACIS-S       Jun 21
        NGC 821                ACIS-S
Radiation Belts
NGC 821                ACIS-S       Jun 22
W44 Pwn                ACIS-S
Vega                   HRC-I        Jun 23
Vega (3 obs)           HRC-S
NGC 821                ACIS-S
M81                    ACIS-S       Jun 24
Radiation Belts
IGR J16207-5129        ACIS-I
1H1426+428             ACIS-S/HETG  Jun 25
W44 Pwn                ACIS-S
NGC 2136/7             ACIS-S       Jun 26
M81                    ACIS-S

------------------------------------------

All spacecraft subsystems continued to support nominal operations.

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