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.

Latest News
  • Chandra CALDB installed at the HEASARC (13 Sep 2019)
    The Chandra CalDB is now installed and available at the HEASARC. Chandra 4.8.4 was released by the CXC on September 13, 2019...
  • NICER detection of a 83 s periodicity in the super-soft source emission from V3890 Sgr (09 Sep 2019)
    Following the detection of super-soft source (SSS) emission from the recurrent nova V3890 Sgr by the Swift-XRT (Page et al., ATel#13084), NICER observations reveal a clear oscillation on a timescale of 83 s. The origin of this short-period modulation is possibly related to the spin of the white dwarf, or nonradial pulsations driven by an instability in the nuclear burning rate of the hot white dwarf.
  • NASA Hubble Fellowship Program (NHFP) Now Accepting Applications (4 Sep 2019)
    The NHFP supports promising postdoctoral scientists performing independent research that contributes to NASA Astrophysics. The research may be theoretical, observational, and/or instrumental. The Announcement of Opportunity, which includes detailed program policies and application instructions, is available at the website. The application submission page will be open from September 3 until November 4, 2019.
  • NICER detects a high luminosity reflare from SAX J1808.4-3658 (04 Sep 2019)
    NICER monitoring of the accreting millisecond X-ray pulsar SAX J1808.4-3658 showed an unusually bright, abrupt and soft reflare from SAX J1808.4-3658 on 2019 Sep 3, during which, over the span of 5.7 hours, the observed count-rate increased fivefold. A 401 Hz QPO was also detected during this reflare. This suggests that the accretion disk has suddenly become smaller in radius.
  • Chandra CALDB 4.8.4 installed at the HEASARC (03 Sep 2019)
    The Chandra CalDB 4.8.4 is now installed and available at the HEASARC. Chandra 4.8.4 was released by the CXC on September 3, 2019...
  • XMM-Newton AO-19 Solicitation Released (20 Aug 2019)
    XMM-Newton observing proposals are solicited in response to the Nineteenth Announcement of Opportunity.

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Last modified: Friday, 21-Jun-2019 15:13:08 EDT

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