Yale’s ISPS Data Archive provides replication packages for research, including data, analysis code, documentation, and related materials.
Dataset
Chandra Data Archive
Search the Chandra Data Archive for astronomical observations and use its data analysis and source catalog tools.
About Chandra Data Archive
The Chandra Data Archive (CDA) is operated by the Chandra X-ray Center to give the astronomical community access to Chandra X-ray observatory data. It provides search and retrieval interfaces, direct access to publicly released data products, and a permanent repository for contributed data products submitted by authors alongside their publications.
Key features
- ChaSeR search and retrieval interface with detailed selection criteria for scientists
- HTTPS direct access to primary and secondary data products of public observations
- Chandra Source Catalog of sources detected in public observations, accessed via CSCview
- Footprint Service overlays Chandra observation footprints on Digital Sky Survey images
- CIAO command-line tools find_chandra_obsid and download_chandra_obsid for public data
- Bibliography search browsing the archive alongside the literature
Best for: Astronomers, researchers and students who need to find, retrieve and cite Chandra X-ray observations and data products.
Good for
- Offers VO-compliant query interfaces and serves as a permanent repository for contributed data products.
- Supports both public and proprietary data access paths, with documented processing and reprocessing status.
- Provides simplified tools such as Chandra Fast Image for the general public alongside scientific interfaces.
Watch out for
- Proprietary data can only be accessed using ChaSeR.
- The CIAO command-line scripts retrieve publicly available Chandra data only.
- Planned electrical outages have taken ChaSeR and other archive interfaces offline during announced windows.
Chandra Data Archive at a glance
- Official website
- cxc.cfa.harvard.edu/cda
- Category
- Research & Data › Open Data & Datasets
- Type
- Dataset
- Platforms
- Web
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Chandra Data Archive FAQ
How can proprietary Chandra data be accessed?
Proprietary data can only be accessed using ChaSeR; the CIAO command-line scripts retrieve publicly available data only.
Is there a simpler search tool for the general public?
Chandra Fast Image is a simplified quick search tool for Chandra X-ray images and other data aimed at the general public.
How can Chandra data be cited in publications?
The archive issues Chandra Data Collection DOIs, which can be requested for a publication.
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