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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

    • NuSTAR Cycle 12 Targets (15 Apr 2026)
      The list of NuSTAR targets recommended by the Cycle 12 peer review is now available. Cycle 12 observations will start to be routinely performed on June 1, 2026. Evaluations will be sent to all NuSTAR Cycle 12 proposal PIs in the coming weeks.
    • XRISM Caldb Update (15 Apr 2026)
      The XRISM Caldb for the Resolve and XTEND instruments has been updated to version 20260315 (CALDB 13). Tar files can be downloaded from the XRISM Calibration page.
    • NuSTAR Caldb Update (15 Apr 2026)
      The NuSTAR FPM caldb was updated to version 20260407. This release includes a new clock correction file, v226, using a new temperature model. Please see the release notes for more details. In addition, the previous caldb version 20260401, which includes a the clock correction file v225 was also released
    • NuSTAR Caldb Update (15 Apr 2026)
      The NuSTAR FPM caldb was updated to version 20260407. This release includes a new clock correction file, v226, using a new temperature model. Please see the release notes for more details. In addition, the previous caldb version 20260401, which includes a the clock correction file v225 was also released
    • XRISM Caldb Update (15 Apr 2026)
      The XRISM Caldb for the Resolve and XTEND instruments has been updated to version 20260315 (CALDB 13). Tar files can be downloaded from the XRISM Calibration page.
    • Swift XRT CALDB updated (6 Apr 2026)
      The Swift XRT caldb has been updated to version 20260327 to update the XRT gains...
    More ...

  • Upcoming Deadlines

    • 07/14/2026: Step 2 Deadline for Future Investigators in NASA Earth and Space Science and Technology
    More ...

  • Upcoming Meetings

    • Massive Black Hole Spin workshop: 2026 Apr 21 - 24
    • The X-ray Universe 2026: 2026 Jun 8 - 11
    • HEACOSS-2026: High Energy Astrophysics and Cosmology in the era of all-sky surveys: 2026 Jun 15 - 19
    • Galactic Frontiers 2026: Advancing X-ray Astronomy in a Multiwavelength Universe: 2026 Jun 15 - 18
    More ...