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
- XSPEC 12.9.0h Released (24 Nov 2015)
Patch 12.9.0h, released November 19, restores the ability to read in XFLT keywords whose values are numbers encoded as strings.
- Swift CALDB Data updated (16 Nov 2015)
A new Swift clock correction file has been added to the Swift SC Caldb (update version 20151105) ...
- Fermi Finds Hints of Gamma-ray Cycle in the Active Galaxy PG 1553+113 (15 Nov 2015)
Astronomers using data from NASA's Fermi Gamma-ray Space Telescope
have detected hints of periodic changes in the brightness of a so-called
"active" galaxy, whose emissions are powered by a supersized black hole. If
the 2.18 year gamma-ray period is confirmed, the discovery would mark the
first years-long cyclic gamma-ray
emission ever detected from any galaxy, which could provide new insights into
physical processes near the black hole (see Ackermann
et al. 2015, ApJL, 813, L41 for more details).
- Fermi Has Detected an extremely bright gamma-ray pulsar in the Large Magellanic Cloud (13 Nov 2015)
The Fermi Gamma-ray Space Telescope Large Area Telescope (LAT)
Collaboration has detected pulsed gamma-ray emission from a previously known
X-ray pulsar in the LMC, PSR J0540-6919 (2015,
Science, 350, 801). This object is the first gamma-ray
pulsar detected in another galaxy and, at 20 times more luminous in gamma-rays
than the Crab pulsar, the brightest yet observed in this energy band.
- NASA's Swift Spots its Thousandth Gamma-ray Burst (12 Nov 2015)
The Swift spacecraft has detected its 1,000th gamma-ray burst
(GRB). GRBs are the most powerful explosions in the universe, typically
associated with the collapse of a massive star and the birth of a black hole.
"Detecting GRBs is Swift's bread and butter, and we're now at 1,000 and
counting," said Neil Gehrels, the Swift principal investigator at NASA's
Goddard Space Flight Center. "The spacecraft remains in great shape after
nearly 11 years in space, and we expect to see many more GRBs to come."
- XSPEC 12.9.0f,g Released (10 Nov 2015)
Patch 12.9.0f fixes a problem with the installation of the NEI v2 files. Patch 12.9.0g fixes a problem with the interpretation of levels in plot contour.
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