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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.

    If there is a published astronomical catalog that you would
    like added to the HEASARC, let us know.

    Browse Quick form divider

    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

    Latest News
  • Viewing tool updated (24 Jun 2026)
    The Viewing tool's Sun angle constraint for NuSTAR observations has been updated to reflect the mission's new requirements.
  • xTime tool updated (22 Jun 2026)
    A new version of the xTime mission date/time conversion tool has been released that adds support for the IXPE mission and fixes some long-standing issues with converting date/times that correspond to leap seconds and negative MET seconds (for all missions except RXTE and Swift).
  • IXPE DU2 Data Delivery Resumed (15 Jun 2026)
    Delivery of data from IXPE's Detector Unit 2 (DU2) has resumed. The IXPE team performed an extensive recalibration campaign including 2.7 Ms of exposure on the bright X-ray binary Cyg X-2 in December 2025 and January 2026. The recalibration has successfully restored the polarization and spectral response of DU2. All data since the anomaly in April 2025 have been reprocessed and re-delivered with DU2. Data delivery for new observations now includes DU2. Users are encouraged to compare the results obtained with the different DUs and report any significant discrepancies via the IXPE Help Desk. For more information on the anomaly, please see this presentation by the IXPE SOC.
  • The Swift-XRT Living Point Source Catalog (LSXPS) Released (11 Jun 2026)
    This table contains the LSXPS catalog of detections by the Swift X-ray Telescope (XRT) used in Photon Counting (PC) mode in the 0.3-10 keV energy range. Under normal operations, this is updated in near-real time, and transient searches are carried out on each dataset as it is received. This catalog is now available in both Browse and Xamin.
  • AMS02SPEC - AMS-02 Spectral Results Catalog Released (11 Jun 2026)
    The AMS02SPEC database table records the spectral results obtained with the Alpha Magnetic Spectrometer experiment on the International Space Station (AMS-02). It is available in both Browse and Xamin.
  • XMMSTACKOB: 5XMM-DR15 XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Stacked Observations Data Catalog Released (10 Jun 2026)
    The XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Stacked Observations Data provides the list of stacks used for the new 5XMM-DR15 catalog (XMMSTACK). This catalog is now available in both Browse and Xamin.

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    Last modified: Monday, 21-Apr-2025 17:48:34 EDT
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