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
- CALET CGBM Data at HEASARC Updated (17 Nov 2025)
The HEASARC has added the CALET Gamma Ray Burst Monitory (CGBM) version 3.2a data to the archive, which contains data from the two Hard X-ray Monitor and Soft Gamma Ray Monitor instruments. The data is now complete up to the end of June 2025. - Swift SC CALDB updated (13 Nov 2025)
The Swift SC has been updated to version 20251106 to update the clock correction file to v169 ... - NuSTAR Caldb Update (29 Oct 2025)
The NuSTAR FPM caldb was updated to version 20251027. This release includes a new clock correction file, v216 using a new temperature model. Please see the release notes for more details. - XRISM AO2 Approved Target List Release (07 Oct 2025)
The list of AO2 approved targets is now publicly available on the XRISM Proposals webpage. For each proposal submitted to NASA in response to the XRISM Cycle 2 call for Type-1 proposals, a detailed email with panel evaluation will be sent at a later stage. - NuSTAR Caldb Update (06 Oct 2025)
The NuSTAR FPM caldb was updated to version 20251006. This release includes a new clock correction file, v215 using a new temperature model. Please see the release notes for more details. - MAXI CALDB updated (01 Oct 2025)
The MAXI CALDB has been updated for the GSC. The GSC CALDB has been updated to version 20250915.
- CALET CGBM Data at HEASARC Updated (17 Nov 2025)
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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
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Upcoming Meetings
- Highly accreting supermassive black holes across all cosmic times: from the local Universe to cosmic dawn: 2025 Dec 01 - 05
- 33rd Texas Symposium on Relativistic Astrophysics: 2025 Dec 08 - 12
- 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