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
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.
- Newly Renamed Swift Mission Spies a Comet Slowdown (13 Jan 2018)
The Gehrels Swift Observatory has captured an unprecedented
change in the rotation of a comet. Images taken in May 2017 reveal
that comet 41P/Tuttle-Giacobini-Kresak was spinning
three times more slowly than it was in March, when it was observed by the
Discovery Channel Telescope at Lowell Observatory, according to
et al. (2018, Nature, 553, 186.
- Swift Renamed to the Neil Gehrels Swift Observatory (13 Jan 2018)
In honor of Neil Gehrels (October 3, 1952 - February 6, 2017), who helped
develop the mission and served as its principal investigator until his death
the Swift Gamma-Ray Burst Explorer has officially been renamed the Neil
Gehrels Swift Observatory.
- Swift CALDB Data updated (13 Jan 2018)
The Swift SC clock correction has been updated (CALDB update version 20180103).
- NICER/SEXTANT proves pulsars can function as a celestial GPS (12 January 2018)
"NASA test proves pulsars can function as a celestial GPS", published in Nature, discusses how NICER/SEXTANT for the first time demonstrated in-space navigation using X-ray pulsars as a form of a Galactic Positioning System. This method will help spacecraft autonomously steer themselves through deep space. These results were featured in a
press conference at the 231st Meeting of the AAS, in Washington DC.
- Preliminary Fermi LAT 8-year Point Source List Available (05 Jan 2018)
A preliminary Fermi LAT 8-year Point Source List (FL8Y), based on the first eight years of science data from the Fermi Gamma-ray Space Telescope mission and the 100 MeV-1 TeV range has been released by the Fermi project. The FL8Y source list has twice as much exposure as the 3FGL, and includes a number of analysis improvements, but does not use an updated model for Galactic diffuse gamma-ray emission. The FL8Y source list includes 5524 sources above 4-sigma significance, and includes source location regions and spectral properties.
- General Catalog of Variable Stars, Version 5.1, March 2017 (03 Jan 2018)
The latest version of this catalog of 52,011 confirmed variable
stars (from Samus
et al. 2017, ARep, 61, 80) is now available in Browse and
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