نتایج جستجو برای: γ ray astronomy
تعداد نتایج: 387045 فیلتر نتایج به سال:
Using Rossi X-ray Timing Explorer Seyfert 1 and 1.2 data spanning 9 years, we study correlations between X-ray spectral features. The sample consists of 350 time-resolved spectra from 12 Seyfert 1 and 1.2 galaxies. Each spectrum is fitted to a model with an intrinsic powerlaw X-ray spectrum produced close to the central black hole that is reprocessed and absorbed by material around the black ho...
The recent progress made in Galactic γ-ray astronomy using the High Energy Stereoscopic System (H.E.S.S.) instrument provides for the first time a population of Galactic TeV γ-ray, and hence potential neutrino sources, for which the neutrino flux can be estimated. Using the energy spectra and source morphologies measured by H.E.S.S., together with new parameterisations of pion production and de...
We report the discovery of TeV gamma-ray emission from the Type Ia supernova remnant (SNR) G120.1+1.4, known as Tycho’s supernova remnant. Observations performed in the period 20082010 with the VERITAS ground-based gamma-ray observatory reveal weak emission coming from the direction of the remnant, compatible with a point source located at 00 25 27.0, +64◦ 10′ 50′′ (J2000). The TeV photon spect...
The 1 5 μm diffuse sky emission from which local foreground emission from the solar system and the Galaxy have been subtracted exceeds the brightness that can be attributed to normal star forming galaxies. The nature of this excess near-infrared background light (NIRBL) is still controversial. On one hand, it has been interpreted as a distinct spectral feature created by the redshifted emission...
Status of the LHAASO experiment and its latest results in both γ -ray astronomic observations charged cosmic ray (CR) measurements are reported this paper. The discovery photons around 1 PeV from Crab, 12 PeVatrons our galaxy new sources with emissions above 100 TeV declare onset utral-high-energy astronomy. capability spectra individual species CRs, e.g. protons iron nuclei, starts era high pr...
The MAGIC 17m-diameter Imaging Air Cherenkov Telescope (IACT) has been commissioned beginning of 2005. The telescope has been designed to achieve the lower detection energy threshold ever obtained with an IACT, about 50 GeV. A new window in γ-ray astronomy is being opened with great impact for exciting new physics and new discoveries. Among the targets of MAGIC is the indirect detection of Dark...
We discuss the concept and the performance of a powerful future ground-based astronomical instrument, 5@5 a 5 GeV energy threshold stereoscopic array of several large imaging atmospheric Cherenkov telescopes installed at a very high mountain elevation of about 5 km a.s.l. for the study of the γ-ray sky at energies from approximately 5 GeV to 100 GeV, where the capabilities of both the current s...
The rate of the 17F(p,γ)18Ne reaction is of significant importance in astrophysical events like novae and x-ray bursts. The decay of 17F is thought to help drive the expansion of the nova envelope, and the 17F(p,γ)18Ne reaction affects the production of 18F, a target of gamma-ray astronomy, as well as being an important link in the (α ,p) reaction chain during the ignition phase of x-ray bursts...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید