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 6.35.2 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
- FITS File Verifier tool updated (16 Jan 2026)
The new version of the FITS File Verifier tool has been reimplemented to be more robust and to use the latest version of the HEASoft fitsverify command line tool. The tool has also been migrated to the HEASARC website. - IXPE Caldb Updated (16 Jan 2026)
The IXPE Caldb has been updated for the GPD (version 20260112). Please see the release notes for details. Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access. - HEAD Spring 2025 newsletter released (14 Jan 2026)
This newsletter is available now for your reading pleasure at your electronic HEAD newsstand ! - NASA PostDoctoral Fellowship - Deadline March 1, 2026 (14 Jan 2026)
The NASA Postdoctoral Program offers US and international scientists the opportunity to advance their research while contributing to NASA's scientific goals. The NPP supports fundamental science; explores the undiscovered; promotes intellectual growth; and encourages scientific connections. Selected by a competitive peer-review process, NPP Fellows complete one- to three-year Fellowship appointments that advance NASA's missions in Earth science, planetary science, heliophysics, astrophysics, biological and physical science, aeronautics and engineering, human exploration systems, space operations, space technology, and astrobiology. Search for NPP research opportunities here: NPP Research Opportunities. - Swift SC CALDB updated (08 Jan 2026)
The Swift SC has been updated to version 20260107 to update the clock correction file to v170 ... - NuSTAR Cycle 12 Now Accepting Proposals (21 Dec 2025)
The due date for NuSTAR Cycle 12 proposal submission is Jan 29, 2026. Proposals should be submitted via the HEASARC's ARK Remote Proposal System (RPS). For more information about this cycle, please visit the NuSTAR Proposal Guide Page.
- FITS File Verifier tool updated (16 Jan 2026)
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Upcoming Deadlines
- 01/22/2026: Step 1 (NOI) Deadline for Citizen Science Seed Funding Program
- 01/23/2026: Step 1 (NOI) Deadline for Astrophysics Pioneers Proposal
- 01/29/2026: Cycle 12 Deadline for NuSTAR General Investigator Proposal
- 01/29/2026: Cycle 19 Deadline for Fermi General Investigator Proposal
- 01/30/2026: Step 2 Deadline for Astrophysics Data Analysis Program
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Upcoming Meetings
- Coupling Radiative Transfer and Atomic Physics to Study r-Process Transients: 2026 Jan 12 - 16
- 60th Rencontres de Moriond on Very High Energy Phenomena in the Universe: 2026 Mar 15 - 22
- BlackHolistic 2026: black holes, accretion and jets across the mass spectrum: 2026 Mar 23 - 27
- THESEUS Conference 2026: 2026 Mar 24 - 26