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 16 September 2005 9.00am EDT

During the last week the observing schedule was resumed at 1:00am on Sept 13 following the shutdown due to high radiation on Sept 7. A total of 285 Ks of observing time was lost due to the event. The loads were interrupted a second time at 9:06pm on Sept 13 due to a further high radiation event and were restarted at 5:50pm on Sept 15 after radiation levels had dropped to acceptable levels.

Shortly after the resumption of the science schedule, at 7:32pm on Sept 15, the ACIS Digital Electronics Assembly side-A (DEA-A) powered off unexpectedly. The decision was made to allow the loads to continue, despite the inability to acquire science data, in order to allow the execution of a maneuver to a favorable thermal attitude. Telemetry was dumped and processed overnight to support the anomaly assessment.

In the event that both solar conditions and ACIS investigation permit restarting observations, the schedule of targets for next week is shown below.

HD 12767 ACIS-S Sep 18 PKS2155-304 ACIS-S/LETG Sep 19 RGB0013+408 Radiation Belts EGS-4 ACIS-I Sep 20 M33 Field 2 ACIS-I Radiation Belts Sep 22 EGS-4 ACIS-I SDSS J231324.46+00 ACIS-S Sep 23 SDSS J1536+5008 ACIS-S M33 Field 3 ACIS-I Radiation Belts Sep 24 EGS-5 ACIS-I Sep 25


All spacecraft subsystems continued to support nominal operations.

Return to Status Reports