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
  • HEASoft 6.26 Released (21 May 2019)
    Released May 21, 2019. This release is primarily driven by updates to the NICER data analysis software, but also includes support for ftps, and other enhancements.
  • Fermi Science Tools Updated (21 May 2019)
    The FermiTools (formerly the SAE) were updated to version 1.0.5 on May 20, 2019.
  • HEAD Spring 2019 newsletter released (20 May 2019)
    This newsletter is available now for your reading pleasure at your electronic HEAD newsstand !
  • NICER XTI CALDB Updated (20 May 2019)
    The NICER XTI caldb has been updated to version 20190516.
  • nH tool updated (16 May 2019)
    The nH tool has been updated with support for the HI4PI survey map. This new map is now the default. The X-Ray Background Tool has also been updated to use the HI4PI map.
  • X-Ray Observations of Compact Group Galaxies (HCGXRBS) Catalog Released (14 May 2019)
    The X-ray Observations of Compact Group Galaxies (HCGXRBS) catalog presents the total galaxy X-ray luminosities and other measured X-ray properties, based on Chandra observations, for 47 galaxies within a sample of 15 compact groups, as well as their multiwavelength properties such as star formation rates and stellar masses. This table is now available in Browse and Xamin.

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Last modified: Friday, 10-Aug-2018 08:29:24 EDT

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