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Operations CXO Status Report

Friday 1 July 2005 9:30am EDT

The IEPHIN instrument exhibited another case of anomalous behavior during a period of high operating temperature starting June 30. The power supply voltage dropped as it became current limited due to the high temperature.

A Chandra image release was issued on 27 June describing X-Rays observed from Saturn's rings. The likely source for this radiation is the fluorescence caused by solar X-rays striking oxygen atoms in the water molecules that comprise most of the icy rings. For details see

The schedule of targets for the next week is shown below and includes a series of observations of the comet 9P/Tempel 1. These observations cover the period of impact of NASA's Deep Impact mission. Also in the week is an observation of M81 coordinated with ground observations.

9P/Tempel 1 (8 obs)     ACIS-S       Jul 4  
Radiation Belts                      Jul 4  
9P/Tempel 1 (6 obs)     ACIS-S       Jul 5  
M81                     ACIS-S       Jul 6  
Holmberg II X-1         ACIS-S/HETG  Jul 6  
Radiation Belts                      Jul 7  
9P/Tempel 1 (4 obs)     ACIS-S       Jul 8  
MXB 1659-29             ACIS-S       Jul 8  
RX J1308.8+2127         ACIS-S       Jul 8  
RX J1713.7-3946 NW      ACIS-I       Jul 9  
NGC7049                 ACIS-I       Jul 9  
RX J1713.7-3946 SW      ACIS-I       Jul 9  
RCW103                  ACIS-I       Jul 9  
RX J1308.8+2127         ACIS-S       Jul 10


All spacecraft subsystems continued to support nominal operations.

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