CDA - Search and Retrieval Options
The Archive
- Public Data
- Proprietary Data
- Repro III
- Repro IV
- Privacy Impact Assessment
- Release Notes
- Documentation
- Archive Operations Team
Search and Retrieve Data
Advanced Data Services
- Synopsis of Services
- Footprint Service
- Chandra Source Catalog
- SDSS Cross-Match Catalog
- Bibliography Search
Archive User Services
- Synopsis of Services
- Processing Status
- Special Requests
- Dataset Identifiers
- Contributed Datasets
- SPIE Repository
Chandra Aggregated Datasets
Publishing Chandra Results
Data Analysis Links
- The archive is fully functional.
- Reprocessing has been completed for
- Phase I: 2005-11-13 to 2011-12-31
- Phase II: 2000-01-30 to 2003-09-04
- ASCDSVER: 8.4
- CALDBVER: 4.5.1
The CDA has a variety of tools available for accessing Chandra data:
- ChaSer
- ChaSeR allows users to browse the observation catalog with a variety of search criteria, to display preview images, and to stage for download any combination of public data products. It is implemented as a platform-independent Java application Download and installation is made easy and the application will notify users when updates are available. The only caveat concerns older window managers such as twm and tvtwm which are not fully X11-compliant and not supported anymore.
- WebChaSer
-
A web version of ChaSeR with slightly different functionality is available. The main restriction is that only complete primary and/or secondary data products packages may be retrieved.
On the other hand, specification of multiple ObsIds has been made easier and log in for obtaining proprietary data has been improved, while more observation-specific information is available, including links to the ADS. This release is aimed at the majority of users who just want to retrieve the primary and secondary data products for specific observations; it offers, for instance, an alternative to PIs and CoIs for obtaining their new observations.
Users outside of North America may be served from different mirrors of the CDA during data retrieval for better data transfer performance.
Two caveats:
- Selecting a range in galactic coordinates works reasonably well for small rectangles, as long as one stays away from the poles. Large ranges and ranges covering the poles may give surprising results.
- For certain ObsIds retrieval of secondary and/or supporting products (e.g., aspect solutions) may not return all products that are required.
- cdaftp
- The primary and secondary data products of all public Chandra observations accessible from an anonymous ftp site
- RetrievER
- A simple interface that allows access to and retrieval of Engineering Request (ER) data which are not available from ChaSer or WebChaSer
- Chandra Fast Image A simplified interface that allows the general public as well as professional astronomers quick access to images and event files
