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
  • NASA's NICER Delivers Best-ever Pulsar Measurements, 1st Surface Map (12 Dec 2019)
    Astrophysicists have redrawn the textbook image of pulsars thanks to new detailed monitoring by NICER of the X-ray pulsar J0030+0451. NICER's detailed measurement of the X-ray pulse shape allowed the distribution of X-ray hot spots over the surface of the pulsar to be mapped out, and determined precise values for the size and mass of the pulsar. A series of papers analyzing NICER's observations of J0030 appears in a focus issue of The Astrophysical Journal Letters.
  • Updated Million Quasars Catalog (v6.4) (11 Dec 2019)
    The latest version (v6.4, 11 Dec 2019) of the Million Quasars (MILLIQUAS) Catalog (Eric Flesch 2009 - 2019) containing a lot more than one million (1,968,377 to be exact) likely quasars is now available in both Browse and Xamin.
  • SkyView v3.5.1: CopyWCS and SIA fixes (09 Dec 2019)
    We have just released SkyView v3.5.1 which has a couple of fixes that shouldn’t affect most people. A bug in the handling of the CopyWCS keyword has been fixed. CopyWCS is a keyword which allows a SkyView-in-a-Jar user to specify ... Continue reading ...
  • XMM-Newton AO-19 Results Released (3 Dec 2019)
    The list of XMM-Newton observing proposals accepted by the AO-19 Observing Time Allocation Committee is now available.
  • An X-ray Flare from eta Carinae as seen by NICER (03 Dec 2019)
    NICER monitoring of the massive colliding wind binary eta Carinae as the stars approach periastron passage has detected a sudden X-ray brightening. This X-ray flare is similar to the X-ray flaring seen at a similar orbital phase in previous binary orbital cycles. X-ray flaring should continue until the star reaches it X-ray maximum before the decline to the X-ray minimum on 2020 February 13.
  • Viewing tool updated (02 Dec 2019)
    Support for the upcoming IXPE mission has been added to Viewing.

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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.