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 16 July 2021 9.00am EDT

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

A real-time procedure was executed on Jul 16 to remove SCS 73 Injector Heater turn on commands for LAE thrusters #1 and #2, located on the sunward side of the spacecraft. The LAE heaters have been used as power ballast during short eclipse events to limit eclipse exit voltage surge; with gradual spacecraft temperature increases over the course of the mission, powering on heaters for hot-side LAE thrusters may result in unacceptable temperature levels. The reduced power draw from leaving only the cold-side heaters on adequately limits the eclipse exit voltage surge.

A Chandra image release was issued on Jul 14 to present data on the galaxy cluster Abell 1775 from Chandra and from other telescopes. Abell 1775 is a system in which a smaller galaxy cluster has collided with a larger one. Galaxy clusters are the largest structures in the Universe held together by gravity, containing hundreds or even thousands of individual galaxies immersed in a thin gas hot enough to radiate X-rays. Because of the large masses and speeds involved, collisions and mergers between galaxy clusters are among the most energetic events in the Universe. In Abell 1775, the smaller cluster in the collision has been stripped of much of its gas, leaving behind a characteristic curved tail of gas visible from Chandra data. New radio data from the LOw Frequency ARray (LOFAR) in the Netherlands and from the Giant Metrewave Radio Telescope (GMRT) in India reveal a radio jet that is a remarkable 2.6 million light years long and is powered by a supermassive black hole in a large elliptical galaxy in the cluster's center. For more details see:

The schedule of targets for the next week is shown below and includes an observation of V1674Her, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 12, and an observation of GRB210704A, which was accepted as a Director's Discretionary Time Target of Opportunity on Jul 13.

        Radiation Belts                     Jul 18
        GRB210704A             ACIS-S
        V1674Her               HRC-S /LETG  Jul 19
        Jupiter                HRC-I
        MGJ0414+0534           ACIS-S
        SWIFTJ2150.2-1889      ACIS-I       Jul 20
        N79                    ACIS-I
        4U1916-053             ACIS-S/HETG
        Radiation Belts                     Jul 21
        N79                    ACIS-I
        Jupiter                HRC-I
        M82X-2                 HRC-I        Jul 23
        MCG2-30-017            ACIS-S
        Radiation Belts                     Jul 24
        NuSTARJ083846-3602.    ACIS-S
        4FGLJ1639.3-5146       ACIS-I
        N79                    ACIS-I
        PSRB2224+65            ACIS-I       Jul 25
        4U1916-053             ACIS-S/HETG


All spacecraft subsystems continued to support nominal operations.

Return to Status Reports