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.
Operations CXO Status Report

Friday 20 January 2017 9.00am EST

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

On Sunday, Jan 15 it was discovered during a real-time pass that the Control Processing Electronics (CPE) Error log counter had unexpectedly incremented by 5 counts. A real-time activity was performed to dump the CPE diagnostic memory. This showed that the CPE had not reset but had experienced out of sync telemetry. Subsequent inspection of recorded telemetry revealed a concurrent single sample of out-of-state values for a number of MSIDs related to pointing control and propulsion. Analysis of this event is on-going, with initial focus on the possibility of a single event upset in the Input Output Electronics. There was no impact to spacecraft health and safety nor any loss of science observing time.

Real-time procedures were executed on Jan 13 to disable SCS-29, and to dump and clear the EPS glitch counters as post-eclipse season actions.

A Chandra image release was issued on Jan 18 describing deep Chandra X-ray Observatory exposures of two nearby energetic pulsars flying through the Milky Way galaxy. The shape of their X-ray emission suggests there is a geometrical explanation for puzzling differences in behavior shown by some pulsars. For details see:

The schedule of targets for the next week is shown below.

        SDSSJ112614.93+31014   ACIS-S       Jan 23
        SDSS1004+4112          ACIS-S
        Radiation Belts                     Jan 24
        M81S                   ACIS-I
        M81N                   ACIS-I
        SDSSJ113923.66+00230   ACIS-S       Jan 25
        IGRJ17096-2527         ACIS-I
        SDSSJ1030+0524         ACIS-I
        SDSSJ131627.84+31582   ACIS-S
        CygnusA-Nucleus        ACIS-I       Jan 26
        Radiation Belts
        M81S                   ACIS-I
        SDSSJ113327.78+03271   ACIS-S       Jan 27
        SDSSJ1030+0524         ACIS-I
        IGRJ17118-3155         ACIS-I
        SDSSJ1030+0524         ACIS-I
        SDSSJ112224.15+03180   ACIS-S       Jan 28
        M81S                   ACIS-I
        CygnusA-Nucleus        ACIS-I
        Radiation Belts                     Jan 29
        M81N                   ACIS-I


All spacecraft subsystems continued to support nominal operations.

Return to Status Reports