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The High Energy Astrophysics Science Archive Research Center (HEASARC) is the primary archive for NASA's (and other space agencies') missions studying electromagnetic radiation from extremely energetic cosmic phenomena ranging from black holes to the Big Bang. Since its merger with the Legacy Archive for Microwave Background Data Analysis (LAMBDA) in 2008, the HEASARC archive contains data obtained by high-energy astronomy missions observing in the extreme-ultraviolet (EUV), X-ray, and gamma-ray bands, as well as data from space missions, balloons, and ground-based facilities that have studied the relic cosmic microwave background (CMB) radiation in the sub-mm, mm and cm bands.

The HEASARC is a member of the NASA Astronomical Virtual Observatories (NAVO) where we work with other NASA archives to ensure comprehensive and consistent VO access to NASA mission datasets. Users may now query the HEASARC's catalogs using VO-enabled services and specialized tools. This page describes how to get to the HEASARC VO-enabled services and provides information on other HEASARC VO activities.
Latest News
  • NuSTAR Caldb Update (02 Jul 2026)
    The NuSTAR FPM caldb was updated to version 20260630. This release includes a new clock correction file, v230, using a new temperature model. Please see the release notes for more details.
  • AMS02SPEC - AMS-02 Spectral Results Catalog Updated (02 Jul 2026)
    The AMS02SPEC database table has been updated with many additional spectral results obtained with the Alpha Magnetic Spectrometer experiment on the International Space Station (AMS-02). It is available in both Browse and Xamin.
  • IXPE Caldb Updated (29 Jun 2026)
    The IXPE Caldb has been updated for the GPD (version 20260610) and XRT (version 20260609). Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access.
  • IXPE Caldb Updated (29 Jun 2026)
    The IXPE Caldb has been updated for the GPD (version 20260610) and XRT (version 20260609). Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access.
  • 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).

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Last modified: Wednesday, 02-Apr-2025 15:14:15 EDT