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Operations CXO Status Report

Friday 30 October 2009 9.00am EDT

During the last week the observing schedule was re-planned to include an observation of the source XTE J1752-223 that was accepted as a Target Of Opportunity (TOO) and to include an observation of the source XTE J1810-197. A scheduled observation of Mkn421 was rescheduled for next week.

A real-time procedure was executed on Oct 27 to update the on-board ephemeris. A second real-time procedure was executed on Oct 27 to patch the flight software with updated MUPS firing parameters. The firing parameter update was planned pre-launch as a maintenance activity to compensate for the decrease in thruster impulse with fuel use. As an additional benefit the updated firing parameters are expected to decrease susceptibility to thermal choking in the thrusters. A third real-time procedure was executed on Oct 28-29 to dump OBC-A memory as a follow-up to the MUPS firing parameters patch. The dump will be used to update the baseline memory image maintained on the ground.

The Einstein Fellows Symposium (formerly Chandra Fellows Symposium) was held on Oct 27-28. Presentations were made by the 23 current Fellows, covering a wide range of topics in observational and theoretical astrophysics research.

The schedule of targets for the next week is shown below and includes a TOO observation of XTE J1752-223.

CPPuppis               ACIS-S/HETG  Oct 31
1641+399               ACIS-S
ISCS1025               ACIS-I
AWM7                   ACIS-I       Nov  1
XTEJ1810-197           ACIS-S
XTEJ1752-223           ACIS-S/HETG
Radiation Belts                     Nov  2
CassiopeiaA            ACIS-S
ISCS1014               ACIS-I       Nov  3
AWM7                   ACIS-I
CassiopeiaA            ACIS-S
31Com                  HRC-I        Nov  4
3C299                  ACIS-S
Radiation Belts                     Nov  5
IC10                   ACIS-S
SDSSJ135154.1+642212   ACIS-S
AWM7                   ACIS-I
Abell1682              ACIS-I       Nov  6
UGCA292                ACIS-S
XTEJ1837+037           ACIS-I
SDSSJ235833.20+0034    ACIS-S
QJ0158-4325            ACIS-S
AWM7                   ACIS-I
M31                    HRC-I        Nov  7
[RC2]A1116+51          ACIS-S
Radiation Belts
Mkn421                 ACIS-S/LETG  Nov  8
3C299                  ACIS-S


All spacecraft subsystems continued to support nominal operations.

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