News by Date
News by Category
Solar System
Stars
White Dwarfs
Supernovas
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Quasars
Galaxy Clusters
Cosmology/Deep Field
Miscellaneous
Press Resources
Status Reports
Press Advisories
Image Releases
Release Guidelines
Image Use Policy
NASA TV
Biographies/Interviews
Web Shortcuts
Chandra Blog
RSS Feed
Chronicle
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 26 December 2014 8.00am EST

During the last week the observing schedule was interrupted due to high radiation associated with solar activity. The loads were halted at 11:52pm EST on Dec 21 through a ground command to execute the SI Safing SCS 107. This ensured that the accumulated radiation dose for ACIS remained below the allowed threshold. All spacecraft actions were nominal. A real-time procedure was executed on Dec 22 to disable SCS-29, which was enabled during the safing sequence. A replanned schedule for resuming science observations was uplinked on Dec 22 with 65.1ks of science loss.

The observing schedule was interrupted again due to high radiation associated with solar activity on Dec 23. The loads were halted at 6:33am EST through a ground command to execute the SI Safing SCS 107. This ensured that the accumulated radiation dose for ACIS remained below the allowed threshold. All spacecraft actions were nominal. Real-time procedures were executed on Dec 23 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. A replanned schedule for resuming science observations was uplinked on Dec 24 with 61.6ks of science loss.

The schedule of targets for the next two weeks is shown below



------------------------------------------
Radiation Belts Dec 29 SDSSJ084220.94+1150 ACIS-S PSRJ1135-6055 ACIS-S Dec 30 ALPHACEN HRC-I Dec 31 GALEXJ080754.6+1410 ACIS-S A763 ACIS-I ChandraDeepField-S ACIS-I Radiation Belts TTau ACIS-S/HETG Jan 1 MS0735.6+7421 ACIS-I Jan 3 PSRJ1135-6055 ACIS-S Radiation Belts ChandraDeepField-S ACIS-I Jan 4 F2M2216-0054 ACIS-I SDSSJ213228.36+0754 ACIS-S UGC03816 ACIS-S SDSSJ085357.87+4633 ACIS-S Jan 5 J084029.91+470710.4 ACIS-S UGC4499 ACIS-S CygnusA-Filament ACIS-I Radiation Belts Jan 6 tauCMa ACIS-S/HETG Radiation Belts Jan 8 PictorAJet ACIS-S Jan 9 HATLASJ090740.0-0042 ACIS-S TON1189 ACIS-S Jan 10 PictorAJet ACIS-S CygnusA-Filament ACIS-I Radiation Belts Jan 11

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

All spacecraft subsystems continued to support nominal operations.

Return to Status Reports