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Access to the catalogs and astronomical archives of the HEASARC

Select an interface or start using our keyword search tool below. HEASARC Data Access Xamin Interfaces Xamin Web InterfaceIntro    Our faster and more powerful access to HEASARC data Xamin API and Batch Interface Access the database with the Xamin application programming interface (API) that can perform all of the same tasks as the UI. You can also use it from your command line. Xamin VO Standard APIs For the full flexibility of SQL queries to bring complicated query logic directly to the database, you can use our VO APIs. See also tutorials for how to access these APIs in Python. Browse Interfaces   Tips Archive Browse Mission Interface   Our full-featured interface Browse Table Index Listing of all tables in the HEASARC database Browse Correlation of 2 Tables Correlation of more than 2 tables is available in Xamin Browse Notification Service Get notified when new data is available in the archive Use Xamin if you wish to monitor any query Browse Batch InterfaceDownload   Perl scripts (by default these now query Xamin database) CMB Data CMB Missions and Projects Data from space-bourne and suborbital CMB experiments in LAMBDA Specialized Forms Argus Proposal/Observation Info Search Browse proposal information for observation details and status Swift Data Query Search bursts and observations of the Swift mission Direct Access to HEASARC Archive Directories Command-Line Downloads Describes using our download script as well as wget and curl. Using HTTPS If there is a published astronomical catalog that you would like added to the HEASARC, let us know.

Other Resources SkyView - An easy-to-use tool that returns digital images of the sky in any waveband from radio through to gamma rays VAO DataScope - Query catalogs and services from the HEASARC and from around the world using a single form Literature - Links to literature search engines and online versions of refereed journals and science magazines Archive Information New and Updated Databases Deleted Databases Data restoration status of all data sets available from the HEASARC Bibliography/archive cross-reference status of HEASARC data sets with ADS-listed publications Science results that used HEASARC data The HEASARC Cookbook - how to find, download, and analyze data Open Archive Policy - find out how you can integrate HEASARC resources into your Web site Documentation for the HEASARC Database System - General description of the database system and a description of the TDAT format used to serialize data and metadata for HEASARC catalogs

Latest News XRISM Cycle 2 call for GO proposals: (17 Mar 2025) The XRISM Cycle 2 call for GO proposals has been announced and is now open. The due date for XRISM Cycle 2 proposal submission is May 15, 2025. See the Proposals and Tools webpage for more information. XRISM Caldb Update (15 Mar 2025) An update to the XRISM Caldb for the Resolve, XTEND and gen instruments is now available. Tar files can be downloaded from the XRISM Calibration page. IXPE Caldb Updated (14 Mar 2025) The IXPE Caldb has been updated for the XRT (version 20241028) and the GPD (version 20250225). Please see the release notes for details. Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access. Chandra Source Catalog v2.1.1 (CSC) Released (14 Mar 2025) The Chandra Source Catalog (CSC) is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory. The CSC delivers a wide variety of uniformly calibrated properties and science ready data products for detected sources over four decades of flux. The Chandra Source Catalog version 2.1 (CSC 2.1) was released on April 2nd 2024; the current minor release is version 2.1.1, updated on 2024 October 18. This release of the catalog includes measured properties for 407,806 unique compact and extended X-ray sources in the sky, allowing statistical analysis of large samples, as well as individual source studies in the "Master Sources" table, available in Browse and Xamin. HEASoft 6.35 released (14 Mar 2025) HEASoft 6.35 has been released. HEASoft 6.35 contains new and updated mission-specific data analysis software (XRISM, IXPE, Swift, RXTE, et al.) 6.35 release notes for details. NuSTAR Caldb Update (10 Mar 2025) The NuSTAR FPM caldb was updated to version 20250303. This release includes a new clock correction file, v200. Please see the release notes for more details. [What is this?]