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Come analyze HEASARC, IRSA, and MAST data in the cloud! The Fornax Initiative is now welcoming all interested beta users.

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.
Query the HEASARC database. Example queries.

Xamin Search Help

  • What ROSAT tables have information on 3c273:
    '3c 273' rosat or 3c273 rosat
  • Find long Chandra exposures:
    chanmaster exposure>10000 status='archived'
  • Tables of cataclysmic variables that include AM Her:
    'AM Her' cataclysmic
  • all of the long ROSAT observations of Messier objects in Scorpius:
    messier rosmaster a.constell='SCO' b.exposure>20000
More information and examples

Active Guest Observer Facilities/Science Centers

AMS-02
AstroSat
BlackCAT
CALET
Chandra
DAMPE
Einstein Probe
Fermi
GECAM
GRBBeta
HXMT-Insight
IXPE
MAXI
NICER
NuSTAR
SRG eRosita /
ART-XC
SVOM
Swift
TESS
XMM-Newton
XPoSat
XRISM
More ...
HEASARC Picture of the Week HEASARC Picture of the Week
See APOD at https://apod.nasa.gov/apod/astropix.html Astronomy Picture of the Day

  • Latest News

    • 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.
    More ...

  • Upcoming Deadlines

    • 08/06/2026: Step 2 Deadline for Astrophysics Research and Analysis Program (APRA)
    • 08/06/2026: Step 1 (Mandatory NOI) Deadline for Strategic Astrophysics Technology (SAT)
    • 08/18/2026: Step 2 Deadline for Research Initiation Awards (RIA)
    • 09/17/2026: Cycle 4 Deadline for IXPE General Observer
    More ...

  • Upcoming Meetings

    • COSPAR: E1.18: Revolutionising High-Energy Astrophysics with NewAthena:2026 Aug 01 - 08
    • COSPAR: E1.8: Accretion Disks and Coronae in AGN:2026 Aug 01 - 08
    • 24th European Workshop on White Dwarfs: 2026 Aug 03 - 07
    • Neutron Stars and Nebulae: Habitats for Photons, Cosmic Rays, and Other Animals: 2026 Aug 09 - 14
    More ...