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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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- Required work plan moved to Expertise and Resources document (30 Jul 2026)
IXPE Cycle 4 proposers should note that the required one paragraph work plan has been moved to the Non-anonymized Expertise and Resources (E&R) document and should be non-anonymized. Consequently, the page limit for the E&R document has now been increased to 2 pages. For more information, please visit the Cycle 4 proposal guide. For any questions about proposal submission and guidelines, please contact the IXPE help desk.
- Chandra Source Catalog Stacked Observation Detections (CSCSTACK), v2.1.1 Released (28 Jul 2026)
The Chandra Source Catalog's Stacked Observation Detections Table (CSCSTACK) includes 493,236 detections (855,402 total entries consisting of detections plus photometric upper limits) based on 10,034 stacks of X-ray observations. The stacked-observation level allows composite properties to be reported from the co-added observations for detections that would otherwise not be visible or have poor S/N in individual observations, while for higher S/N detections the per-observation properties facilitate analysis of variable sources. The CSCSTACK table is available in Browse and
Xamin.
- Swift SC CALDB updated (06 Jul 2026)
The Swift SC has been updated to version 20260702 to update the clock correction file to v173 ...
- NuSTAR Caldb Update (02 Jul 2026)
The NuSTAR FPM caldb was updated to version 20260630. This release includes a new clock correction file, v230, using a new temperature model. Please see the release notes for more details.
- NuSTAR Caldb Update (02 Jul 2026)
The NuSTAR FPM caldb was updated to version 20260630. This release includes a new clock correction file, v230, using a new temperature model. Please see the release notes for more details.
- IXPE Caldb Updated (29 Jun 2026)
The IXPE Caldb has been updated for the GPD (version 20260610) and XRT (version 20260609). Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access.
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HEASARC News
Upcoming Dates & Deadlines
Upcoming Astronomy Meetings
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