News by Date
News by Category
Solar System
White Dwarfs
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Galaxy Clusters
Cosmology/Deep Field
Press Resources
Status Reports
Press Advisories
Image Releases
Release Guidelines
Image Use Policy
Web Shortcuts
Chandra Blog
RSS Feed
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Chandra @ NASA
Visit the Chandra pages at the NASA portal (opens in new window)
Image Use
Image Use Policy & Request Form
Guidelines for utilizing images, applets, movies, and animations featured in this Web Site.
Getting Hard Copies of Images
Ways to obtain photos, slides, etc of Chandra images.
Operations CXO Status Report

Friday 8 March 2012 9.00am EST

During the last week the observing schedule was interrupted by a high-radiation event that activated the science instrument safing sequence (SCS 107) and stopped observing at 00:29am EST on Mar 7. All spacecraft actions were nominal. Real-time procedures were executed on Mar 7 to disable SCS-29, which was enabled during the safing sequence, and to update the observation identifier number, to aid CXCDS processing of the interrupted observation. Observations that were impacted will be rescheduled.

A flight software patch was uplinked on Mar 2 to update the on-board gyro calibration misalignment matrix. Real-time procedures were executed on Mar 3 to dump OBC-A memory as a follow-up to the patch. The dump will be used to update the baseline memory image maintained on the ground. A real-time procedure was executed on Mar 7 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer.

A Chandra press release was issued on Mar 2 as a NASA press release describing multi-telescope observations of Abell 520, colliding galaxy clusters. Astronomers used Chandra, Hubble, and the Subaru and Canada-France-Hawaii telescopes to observe Abell 520, which is 2.4 billion light years away. A clump of dark matter has apparently been left behind after a violent collision of galaxy clusters. This dark matter clump contains far fewer galaxies than would be expected if the dark matter and galaxies hung together. For details see:

The schedule of targets for the next week is still in development and subject to the on-going effects of heightened Solar activity.

All spacecraft subsystems continued to support nominal operations.

Return to Status Reports