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 Cycle 6 Proposal Deadline is Near, Proposals MUST be Anonymized (17 Jan 2020)
    Phase-1 science proposals are due by 4:30 p.m. EST, January 24, 2020. Please see the Guide for Proposers and the Guidelines for Anonymous Proposals for more details.
  • Swift CALDB Data updated (08 Jan 2020)
    The Swift SC clock correction file has been updated (CALDB update version 20200106).
  • NuSTAR CALDB Update (19 Dec 2019)
    The NuSTAR CALibration DataBase was updated on December 19, 2019 (CALDB version 20191219). This is a patch release for update 20191213.
  • Chandra Source Catalog v2 (CSC) Released (19 Dec 2019)
    The Chandra Source Catalog (CSC) is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory. By combining Chandra's sub-arcsecond on-axis spatial resolution and low instrumental background with consistent data processing, the CSC delivers a wide variety of uniformly calibrated properties and science ready data products for detected sources over four decades of flux. The second major release of the catalog, CSC 2.0, includes measured properties for 317,167 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.
  • HEAD Fall 2019 newsletter released (19 Dec 2019)
    This newsletter is available now for your reading pleasure at your electronic HEAD newsstand !
  • ARK/RPS Downtime Scheduled for 2019-12-18 Completed (18 Dec 2019)
    The scheduled maintenance for the ARK database has completed, and ARK/RPS is fully operational. If you encounter any issues, please contact the ARK Help Desk.

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Last modified: Friday, 21-Jun-2019 15:13:08 EDT

HEASARC support for unencrypted FTP access ended on September 20, 2019. Please see this notice for details.