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HEASoft and XSPEC are now available as conda packages. See details ....

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
  • Latest News

  • Upcoming Deadlines

    • 05/15/2025:Cycle 2-Type 1 Deadline for XRISM General Observer Proposal
    • 05/15/2025:Cycle 2-Type 2 Deadline for XRISM General Observer Proposal
    • 10/10/2025:AO-25 XMM Newton Deadline
  • Upcoming Meetings

    • AXIS Community Science Workshop: 2025 May 14 - 16
    • XMM 25th Anniversary Conference: 2025 May 19 - 22
    • Chandra/CIAO Workshop: 2025 May 19 - 23
    • Massive Galaxies: 2025 Jun 09 - 13