The Chandra X-ray Observatory continues to operate as usual.

Chandra Cycle 22 Peer Review Results Released

Lists of targets plus archive and theory proposals recommended by the Cycle 22 Peer Review are now posted.

Read the full announcement here.

7/27/20

Temporary Restrictions on Chandra DDT and ToO triggers:

Due to a major flight operations update and the ensuing calibration, we are limiting ToO and DDT triggers from 25 July - 9 August.

Read the full announcement here.

7/24/20

Availability of Blank Sky HRC-S Observations

Two new blank sky observations have been publicly released into the Chandra archive.

Read the full announcement here.

7/20/20

Chandra News
Issue 27 - Spring 2025

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Proposer

Main Proposer Page

Chandra Proposal Software (CPS)

Proposal FAQ

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ObsVis

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Observations and Schedules

Long Term Schedule

Short Term Schedule

Observation Scheduling and Support

Cycle Targets and Statistics

Special Calls for Proposals

Archive and Data Processing

ChaSeR: query Chandra observations

Chandra Data Archive

Footprint Service

Reprocessing Information

Chandra Source Catalog

TGCAT: Grating Data Catalog and Archive

Data Analysis

CIAO Software Package

Data Analysis Threads

Sherpa Modeling and Fitting

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Contributed/Related Software

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Chandra Users' Committee (CUC)

NASA Hubble Fellowship Program

Announcements

Visit Collaborators at the CXC

Science Workshops

Peer Review Website

Publications

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Chandra Bibliography Search

Chandra Bibliography Statistics

Press Releases

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