Results 71 to 80 of about 88,325 (210)
Mobile Gamma Spectrometry Survey of the Scottish Enterprise Technology Park, East Kilbride, 17th-19th August 2009 [PDF]
, 2010 <p>Environmental radioactivity arises from natural geological sources, the redistribution of natural activity through industrial processes, the nuclear industry including routine and accidental discharges into the environment, and various medical ...
Sanderson, D.C.W. +3 more
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The Astrophysical JournalCosmic voids may have novel effects on the propagation of high-energy photons. We consider the fraction of the line of sight that intersect voids (termed “voidiness”).
Ollie Jackson +4 more
doaj +1 more source
EPJ Web of Conferences, 2016 We use the recent measurement of the isotropic γ–ray background (IGRB) by Fermi LAT and analysis of the contribution of unresolved point γ–ray sources to IGRB to build constraints on the models of ultra-high cosmic rays (UHECR) origin.
Kalashev Oleg
doaj +1 more source
Very high energy gamma ray astronomy and non pulsating low mass x-ray binaries [PDF]
, 1991 This thesis is concerned with non pulsating Low Mass X-Ray Binaries as Very High Energy γ-ray sources, in particular Scorpius X-1; the brightest of these objects in X-rays, and the most likely to be detectable at energies above 250 GeV.
Carraminana, Alberto, Carraminana, A
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, 2010 In the first year since the launch of the Fermi Observatory, the Gamma-ray Burst Monitor (GBM) has detected over 250 gamma-ray bursts (GRBs). Besides GRBs, GBM has triggered on other transient sources, such as soft gamma-ray repeaters and terrestrial ...
The Fermi GBM Team, BISSALDI, ELISABETTA
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The properties of discrete X-ray sources in star-forming galaxies [PDF]
, 2012 Observations of starburst galaxies have revealed a large number of point-like X-ray sources located within these systems, including active galactic nuclei (AGN), X-ray binaries (XRBs), and utraluminous X-ray sources (ULXs).
JACKSON, FLOYD,EMMANUEL
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A Discussion on the Origin of the Sub-PeV Galactic Gamma-Ray Emission
The Astrophysical JournalGalactic diffuse gamma-ray flux measured by the Tibet AS γ experiment and the total Galactic gamma-ray flux measured by the Large High Altitude Air Shower Observatory (LHAASO) are found to be consistent, within the statistical and systematic ...
S. Kato +18 more
doaj +1 more source
Extragalactic Gamma-Ray Sources [PDF]
, 2004 This chapter provides a review of γ-ray sources lying at high Galactic latitudes. Their statistical properties and variability status, as well as studies involving cross correlations with lower frequency catalogs and multiwavelength observations, are summarized. The case for active galactic nuclei is analyzed with special emphasis, since they represent
openaire +1 more source
Source Density Evolution of Gamma‐Ray Bursts
The Astrophysical Journal, 1999 12 pages, 4 figures, accepted by ...
Che, H., Yang, Y., Nemiroff, R. J.
openaire +2 more sources
Gamma ray astronomy in the low energy range
, 1979 A low energy gamma ray telescope, and the results of its observations are described. The telescope consisted of four sodium iodide crystals, each of 120 cm2 area, occulted by lead discs.
Bailey, E.P.A.
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