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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

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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

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All spacecraft subsystems continued to support nominal operations.

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