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.

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This Week's High-Energy Picture
APOD: Astronomy Picture
of the Day

Today's APOD Image

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Enter positions, times, missions, etc to query the HEASARC database.

Try ROSAT 3c273 1d to get ROSAT data within one degree of 3C273 or chanmaster bii>80 status='archived' to get archived Chandra observation data near the north galactic pole.

Note: For more than one target or when using any qualifier other than a mission, use quotes around targets that have embedded white space.(e.g., 'ar lac').

More information and examples


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Latest News
  • Press Release: Astrosat, Chandra, Hubble Simultaneously Detect a Coronal Explosion on the Nearest Planet-Hosting Star (20 Jul 2017)
    Stars like Proxima Centauri are known to flare on timescales of a few minutes to hours. The ongoing analysis of the data for this flare detected on 31 May 2017 suggests that the flux increases by several orders of magnitude in both X-rays and UV and lasts ~1800 seconds. The energy released during this flare is of the order of ~10 30 erg, 100 times the energy of large solar flares.
  • Sloan Digital Sky Survey Quasar Catalog (12th Data Release: DR12Q) (20 July 2017)
    The SDSS DR12Q Catalog listing the X-ray, UV, optical, IR and radio properties of 297,301 quasars, as well as their redshifts, that were identified in the Baryon Oscillation Spectroscopic Survey (BOSS) of the SDSS-III via visual inspection of their spectra (from Paris et al. 2017, A&A, 597, A79) is now available in Browse and Xamin
  • Gamma-ray Telescopes Reveal a High-energy Trap in Our Galaxy's Center (19 Jul 2017)
    A combined analysis of data from the Fermi Gamma-ray Space Telescope and the High Energy Stereoscopic System (HESS), a ground-based observatory in Namibia, suggests the Galactic Center contains a "trap" that concentrates some of the highest-energy cosmic rays, among the fastest particles in the Galaxy. Gaggero et al. (2017) combined low-energy Fermi LAT data with high-energy HESS data of the Galactic Center to create a continuous gamma-ray spectrum describing this emission across a thousand-fold span of energies.
  • NICER First Light (17 Jul 2017)
    NASA's new Neutron star Interior Composition Explorer (NICER) mission to study the densest observable objects in the universe has begun science operations. To date, NICER has observed over 40 celestial targets to calibrate the X-ray Timing Instrument and supporting star-tracker camera. The observations also validated the payload's performance that will enable its key science measurements.
  • The NuSTAR Serendipitous Survey 40-Month Primary Source Catalog (12 Jul 2017)
    This catalog of 498 sources detected by the Nuclear Spectroscopic Telescope Array (NuSTAR) in ~20 Ms of effective exposure time over 331 fields, with an areal coverage of 13 deg 2 over the 3-24 keV energy range (from Lansbury et al. 2017, ApJ, 836, 99) is now available in Browse and Xamin, as is the companion Secondary Source Catalog of 64 other X-ray sources from the same paper.
  • XSPEC 12.9.1j,k Patches Released (12 Jul 2017)
    Released on June 30, 2017. Release 12.9.1j fixes several issues wiht the "goodness" command, while 12.9.1.k improves diagnostic output in some instances when using the NEI model.

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Last modified: Thursday, 20-Jul-2017 00:30:07 EDT