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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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- IXPE Data Reprocessing (18 Sep 2026)
The IXPE Science Operations Center has begun reprocessing IXPE observations beginning with the first observation of the baseline mission, the supernova remnant Cas A (ObsID 01001301). Reprocessing will proceed chronologically through all observations taken prior to 08 April 2025. Observations made beyond that date have already been processed with the latest software version. Reprocessing often results in improved energy gain, improved aspect determination, and increased exposure times. To determine if a particular observation has been reprocessed, check, e.g., the processing date field in HEASARC's Browse interface or the DATE keyword value in the Level 2 event list files.
- XRISM Key Program Call for Proposals (09 Sep 2026)
The first XRISM Key Program call has been announced
with due date of December 3, 2026 (EST)/December 4, 2026 (JST).
Submissions will open mid-October. For more information, see the
Proposals and Tools webpage.
- NuSTAR Caldb Update (03 Sep 2026)
The NuSTAR FPM caldb was updated to version 20260903. This release includes a new clock correction file, v232, using a new temperature model. Please see the release notes for more details.
- NuSTAR Caldb Update (03 Sep 2026)
The NuSTAR FPM caldb was updated to version 20260903. This release includes a new clock correction file, v232, using a new temperature model. Please see the release notes for more details.
- Swift SC CALDB updated (01 Sep 2026)
The Swift SC has been updated to version 20260901 to update the clock correction file to v174 ...
- Additional opportunities to propose for NuSTAR time (19 Aug 2026)
NuSTAR observing time can be requested through the IXPE Cycle-4 (up to 500 ks; due September 17th) and XMM-Newton Cycle-26 (up to 1500 ks; due October 9th) proposal opportunities.
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HEASARC News
Upcoming Dates & Deadlines
Upcoming Astronomy Meetings
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