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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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Latest News
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- Chandra Source Catalog (CSC) and related catalogs, v2.2 Released (05 Nov 2026)
The Chandra Source Catalog (CSC) is the definitive catalog of
X-ray sources detected by the Chandra X-ray Observatory. The CSC delivers a
wide variety of uniformly calibrated properties and science ready data
products for detected sources over four decades of flux. The Chandra Source
Catalog version 2.2 (CSC 2.2) was released in October 2026. This release of
the catalog includes measured properties for 432,713 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.
It is now available in Browse and
Xamin. Four other related catalogs are also released:
CSC Master Source-Stacked Source Associations (CSCASSOC), CSC Stacked Detections (CSCSTACK), CSC Stacked Source-Observations Source Associations (CSCSTOBAS), and CSC Stacked Source Per-observation Detections (CSCSTACKOB).
- Swift SC CALDB updated (04 Nov 2026)
The Swift SC has been updated to version 20261102 to update the clock correction file to v175 ...
- NuSTAR Caldb Update (04 Nov 2026)
The NuSTAR FPM caldb was updated to version 202611102. This release includes a new clock correction file, v235, using a new temperature model. Please see the release notes for more details.
- NuSTAR Caldb Update (04 Nov 2026)
The NuSTAR FPM caldb was updated to version 202611102. This release includes a new clock correction file, v235, using a new temperature model. Please see the release notes for more details.
- Self-nominations requested for NuSTAR Users' Committee (02 Nov 2026)
NuSTAR is seeking worldwide self-nominations for 4-year terms on its Users' Committee to provide community advice and project feedback.
Letters of self-nomination, consisting of a one-page statement and a one-page CV, should be sent to nuc-chair@lists.srl.caltech.edu by December 4.
- NuSTAR Caldb Update (21 Oct 2026)
The NuSTAR FPM caldb was updated to version 20261020. This release includes a new clock correction file, v234, using a new temperature model. Please see the release notes for more details.
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HEASARC News
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