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Operations CXO Status Report

Friday 9 April 2010 9.00am EDT

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

A real-time procedure was executed on Apr 6 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer. A second real-time procedure was executed on Apr 7 to patch the ACIS flight software. The new version (48, Standard E, Optional E) includes code changes that address issues such as errors in identifying bad pixels in sub-array mode and preventing a Back End Processor reset on Front End Processor powerdown while its bias map is copied to telemetry packets.

Of note this week was the release on Apr 5 of CALDB 4.2.1. This update includes ACIS time-dependent gain corrections for the period Nov 2009 through Jan 2010, updated ACIS blank-sky backgrounds, and updated LETG grating efficiencies.

The schedule of targets for the next week is shown below

------------------------------------------
NGC1340                ACIS-S       Apr 12
CasA                   HRC-I
ChandraDeepField-S     ACIS-I
Radiation Belts                     Apr 13
EN1-349                ACIS-S
Q0957+561              ACIS-S
NGC4486A               ACIS-S
EN1-349                ACIS-S
2PIGG_m1441            ACIS-I       Apr 14
ESO323-G077            ACIS-S/HETG
SNR0049-73.6           ACIS-S
Radiation Belts                     Apr 15
EN1-349                ACIS-S
Vega (3 obs)           HRC-S        Apr 16
Vega                   HRC-I
Vega                   HRC-S
PGC1217593             ACIS-S
RXJ1131-1231           ACIS-S
ChandraDeepField-S     ACIS-I
RXJ033340.22-391833.   ACIS-S       Apr 17
6dFJ0405204-364859     ACIS-S
Radiation Belts                     Apr 18
ChandraDeepField-S     ACIS-I

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

All spacecraft subsystems continued to support nominal operations.

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