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
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.
- NICER detection of periodicity in the new X-ray transient MAXI J0901-531 (19 Apr 2021)
NICER observation of the newly-discovered X-ray transient MAXI J0901-531 found periodic X-ray variations with a period of P = 14.055 seconds, consistent with the gamma-ray period seen by Fermi.
- MAXI/GSC 7-Year High and Low Galactic Latitude Source Catalog (3MAXI) (13 Apr 2021)
This catalog of 221 low galactic latitude X-ray sources and 686
high galactic latitude X-ray sources detected by the MAXI Gas Slit Camera
(GSC) in its first 7 years of operations (combining Hori et al. 2018, ApJS,
207, 36 and Kawamuro et al. 2018, ApJS, 238, 33) is now available in Browse
- NICER Finds X-ray Boosts in the Crab Pulsar's Radio Bursts (08 Apr 2021)
A global science collaboration using data from NASA's Neutron star Interior Composition Explorer (NICER) telescope has discovered X-ray surges accompanying radio bursts from the pulsar in the Crab Nebula. The finding shows that these giant radio pulses release far more energy than previously suspected.
- NICER follow-up of SRGA J181414.6-225604 (08 Apr 2021)
NICER followup observations of a possible new X-ray transient
discovered by the SRG observatory detected a source showing a peak in soft X-rays and a hard non-thermal tail at higher energies. No evidence for temporal variability was seen.
- Viewing tool updated (07 Apr 2021)
The Swift pole constraints have been updated in the Viewing
tool. The revised coefficients extrapolate the trend for the next two
- NICER Virtual Data Analysis and Science Meeting: Registration Open (31 Mar 2021)
Registration is now open for a virtual data analysis workshop, which will be held the week of May 10, 2021, on Monday, Tuesday, Thursday and Friday, 9 am to 1 pm. You can register using the workshop registration form.
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Upcoming Dates & Deadlines
Upcoming Astronomy Meetings