HEASARC's web sites were down from Saturday Oct 24 - Weds Oct 28 due to addressing the PHP security vulnerability issue.
HEASARC
NASA's designated multi-mission astronomy archive for cosmic astronomy datasets for observations in the extreme ultraviolet (EUV), X-ray, and gamma-ray wave bands, as well as for cosmic microwave background (CMB) datasets.LAMBDA
LAMBDA is a multi-mission NASA center of expertise for cosmic microwave background (CMB) radiation research; it provides CMB researchers with archive data from cosmology missions, software tools, and links to other sites of interest.Please wait for the query to run. You will be redirected to the search portal
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Archive
Data discovery and exploration can be done through the interactive Web Portal
(The classic Browse portal remains available.)
API access is available through the Xamin API, the astroquery Heasarc module, or the Virtual Observatory protocols using pyvo. -
Cloud & Platforms
HEASARC@SciServer is an analysis-ready platform where both data and software are available through the browser.
The HEASARC is also part of the NASA Fornax Initiative to build NASA's next generation cloud-based science platform.
HEASARC data are available in the cloud and on SciServer. -
Software
- HEASoft 6.37.0 is now available.
- HEASoft and XSPEC are available as conda packages.
- HEASoft and other high energy software (CAIO, XMM-SAS, Fermitools, Spex etc) are installed and available on SciServer.
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Latest News
- 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.
- Chandra Source Catalog (CSC) and related catalogs, v2.2 Released (05 Nov 2026)
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Upcoming Deadlines
- 12/03/2026: Step 2 Deadline for Theoretical and Computational Astrophysics Networks (TCAN)
- 12/03/2026: XRISM Key Program Deadline
- 01/28/2027: Cycle 13 Deadline for NuSTAR General Observer
- 01/28/2027: Cycle 20 Deadline for Fermi General Investigator
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Upcoming Meetings
- Joint Space-Science Institute (JSI) 2026 Workshop: A NICER Legacy: Neutron Stars, Black Holes, and Time-Domain Astronomy
- The ARC Of the Universe: 2026 Nov 30 - Dec 3
- XPOCO: X-ray Polarization Of Compact Objects: 2027 Jan 11 - 15
- IAU Symposium 413: AGN Jets from Gamsberg to the Multi-Messenger Frontier: 2027 Jan 18 - 22