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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 http://chandra.harvard.edu/photo/2005/saturn_rngs/

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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