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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
  • IXPE Data Reprocessing (18 Sep 2026)
    The IXPE Science Operations Center has begun reprocessing IXPE observations beginning with the first observation of the baseline mission, the supernova remnant Cas A (ObsID 01001301). Reprocessing will proceed chronologically through all observations taken prior to 08 April 2025. Observations made beyond that date have already been processed with the latest software version. Reprocessing often results in improved energy gain, improved aspect determination, and increased exposure times. To determine if a particular observation has been reprocessed, check, e.g., the processing date field in HEASARC's Browse interface or the DATE keyword value in the Level 2 event list files.
  • XRISM Key Program Call for Proposals (09 Sep 2026)
    The first XRISM Key Program call has been announced with due date of December 3, 2026 (EST)/December 4, 2026 (JST). Submissions will open mid-October. For more information, see the Proposals and Tools webpage.
  • NuSTAR Caldb Update (03 Sep 2026)
    The NuSTAR FPM caldb was updated to version 20260903. This release includes a new clock correction file, v232, using a new temperature model. Please see the release notes for more details.
  • NuSTAR Caldb Update (03 Sep 2026)
    The NuSTAR FPM caldb was updated to version 20260903. This release includes a new clock correction file, v232, using a new temperature model. Please see the release notes for more details.
  • Swift SC CALDB updated (01 Sep 2026)
    The Swift SC has been updated to version 20260901 to update the clock correction file to v174 ...
  • Additional opportunities to propose for NuSTAR time (19 Aug 2026)
    NuSTAR observing time can be requested through the IXPE Cycle-4 (up to 500 ks; due September 17th) and XMM-Newton Cycle-26 (up to 1500 ks; due October 9th) proposal opportunities.

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    Page maintainer: M. F. Corcoran
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    Last modified: Monday, 21-Apr-2025 17:48:34 EDT
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