Academic literature on the topic 'Gamma ray sources'

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Journal articles on the topic "Gamma ray sources"

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ZABALZA, VÍCTOR. "GAMMA-RAY OBSERVATIONS OF GAMMA-RAY BINARIES." International Journal of Modern Physics: Conference Series 28 (January 2014): 1460161. http://dx.doi.org/10.1142/s2010194514601616.

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Gamma-ray binaries are binary systems that emit most of their radiative output above 1 MeV. Following the detection of five such systems in the past decade, they have been clearly established as a population of galactic GeV and TeV sources. In this review I discuss their recent gamma-ray observational results from Cherenkov telescopes and the Fermi satellite. A common trend has emerged in the high-energy spectra of several of these sources, with the detection of two separate components at GeV and TeV energies that cannot be explained as being emitted from a single region, and here I discuss a
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Romero, Gustavo E. "Microquasars and Gamma-ray Sources." Chinese Journal of Astronomy and Astrophysics 5, S1 (2005): 110–20. http://dx.doi.org/10.1088/1009-9271/5/s1/110.

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Aharonian, F. A. "Galactic TeV gamma-ray sources." Astroparticle Physics 11, no. 1-2 (1999): 225–34. http://dx.doi.org/10.1016/s0927-6505(99)00055-9.

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Kifune, T., M. Sadzinska, J. Wdowczyk, A. W. Wolfendale, A. J. Norton, and R. S. Warwick. "Synchrotron X-ray haloes around gamma ray sources." Monthly Notices of the Royal Astronomical Society 228, no. 2 (1987): 243–50. http://dx.doi.org/10.1093/mnras/228.2.243.

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Boer, Michel, M. Gottardi, K. Hurley, and G. Pizzichini. "X-ray observations of gamma-ray burst sources." Astrophysics and Space Science 169, no. 1-2 (1990): 153–58. http://dx.doi.org/10.1007/bf00640703.

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Kato, S., D. Chen, J. Huang та ін. "On the Source Contribution to the Galactic Diffuse Gamma Rays above 398 TeV Detected by the Tibet ASγ Experiment". Astrophysical Journal Letters 961, № 1 (2024): L13. http://dx.doi.org/10.3847/2041-8213/ad19d2.

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Abstract Potential contribution from gamma-ray sources to the Galactic diffuse gamma rays observed above 100 TeV (sub-PeV energy range) by the Tibet ASγ experiment is an important key to interpreting recent multimessenger observations. This paper reveals a surprising fact: none of the 23 Tibet ASγ diffuse gamma-ray events above 398 TeV within the Galactic latitudinal range of ∣b∣ < 10° come from the 43 sub-PeV gamma-ray sources reported in the 1LHAASO catalog, which proves that these sources are not the origins of the Tibet ASγ diffuse gamma-ray events. No positional overlap between the Tib
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PIRAN, TSVI. "GAMMA-RAY BURSTS." International Journal of Modern Physics A 17, no. 20 (2002): 2727–31. http://dx.doi.org/10.1142/s0217751x02011680.

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Gamma-Ray Bursts (GRBs) are the most relativistic objects discovered so far. I describe here two aspects of the relativistic nature of GRBs. Their likely association with the formation of black holes and their possible role as sources of gravitational radiation.
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Nesci, R., G. Tosti, T. Pursimo, R. Ojha, and M. Kadler. "Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources." Astronomy & Astrophysics 555 (June 18, 2013): A2. http://dx.doi.org/10.1051/0004-6361/201321094.

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GHISELLINI, GABRIELE. "EXTRAGALACTIC GAMMA-RAYS: GAMMA RAY BURSTS AND BLAZARS." International Journal of Modern Physics A 20, no. 29 (2005): 6991–7000. http://dx.doi.org/10.1142/s0217751x05030673.

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The extragalactic gamma-ray sky is dominated by two classes of sources: Gamma-Ray Bursts (GRBs) and radio loud active galactic nuclei whose jets are pointing at us (blazars). We believe that the radiation we receive from them originates from the transformation of bulk relativistic energy into random energy. Although the mechanisms to produce, collimate and accelerate the jets in these sources are uncertain, it is fruitful to compare the characteristics of both classes of sources in search of enlightening similarities. I will review some general characteristics of radio loud AGNs and GRBs and I
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Partenheimer, Angelina, Ke Fang, Rafael Alves Batista, and Rogerio Menezes de Almeida. "Ultra-high-energy Cosmic-Ray Sources Can Be Gamma-Ray Dim." Astrophysical Journal Letters 967, no. 1 (2024): L15. http://dx.doi.org/10.3847/2041-8213/ad4359.

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Abstract Ultra-high-energy cosmic rays (UHECRs), accelerated hadrons that can exceed energies of 1020 eV, are the highest-energy particles ever observed. While the sources producing UHECRs are still unknown, the Pierre Auger Observatory has detected a large-scale dipole anisotropy in the arrival directions of cosmic rays above 8 EeV. In this work, we explore whether resolved gamma-ray sources can reproduce the Auger dipole. We use various Fermi Large Area Telescope catalogs as sources of cosmic rays in CRPropa simulations. We find that in all cases, the simulated dipole has an amplitude signif
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Dissertations / Theses on the topic "Gamma ray sources"

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Rogers, Martin John. "Gamma-ray evidence for cosmic-ray sources." Thesis, Durham University, 1988. http://etheses.dur.ac.uk/6343/.

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The origin of cosmic-rays is one of the long-standing problems in astro physics. In recent years, strong evidence has been found that certain classes of object contain and are able to accelerate particles to high energies. In this thesis the origin problem is addressed in two different ways. Firstly, two different regions of the Galaxy are studied using γ-ray observations from the COSB satellite combined with atomic and molecular gas measurements. The Vela region contains a pulsar and a supernova remnant and is particularly valuable location for cosmic-ray studies because of its proximity, the
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吳文謙 and Man-him Ng. "Searching for gamma-ray signals form pulsars and periodic signals fromthe galactic gamma-ray sources." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213509.

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Syson, Alexandra Jane. "Search for unidentified gamma-ray sources." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493790.

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This thesis shows how improvements can be made to two dimensional gamma - ray source analysis by using a probabilistic approach to describe the possible source location and likelihood of a candidate gamma-ray event. The mapping algorithm developed assesses the significance of source detection, and background subtraction is implemented both by a modified standard approach and by the development of a multivariate kernel analysis.
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Ng, Man-him. "Searching for gamma-ray signals form pulsars and periodic signals from the galactic gamma-ray sources /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19667942.

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Tsurusaki, Kazuma. "VERITAS observations of galactic gamma-ray sources." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3394.

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The main topic of this thesis is analysis of an unidentified Galactic TeV gamma-ray source, MGRO J1908+06, discovered by Milagro instrument in 2007. We analyzed 54 hours of observational data from the Very Energetic Radiation Imaging Telescope Array System (VERITAS), a ground-based gamma-ray observatory in southern Arizona comprised of an array of four Cherenkov Telescopes that reconstructs the energy and direction of astrophysical gamma-rays by imaging Cherenkov light emitted by energetic particles in air showers produced by the primary gamma-rays. MGRO J1908+06 is located between a supernova
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Edwards, Philip Gregory. "A search for ultra high energy gamma ray emission from binary X-ray systems." Title page, contents and summary only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phe266.pdf.

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Ciampa, Dominic. "A southern hemisphere search for ultra-high-energy gamma ray sources." Title page, contents and summary only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phc565.pdf.

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Graham, Lilian Joan. "Ultra high energy gamma ray point sources and cosmic ray anisotropy." Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5594/.

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The experimental set-up at the Baksan Air Shower Array, used to detect air showers above ~0.2xl0(^14)eV, is described. An estimation of the angular resolution using the cosmic ray shadow of the Sun and the Moon gives a value of ~2.5˚ which is consistent with previous estimates from Monte-Carlo simulations. Using data from this array covering 1985-1992, a search is made for 7-ray emission from 18 candidate sources. Upper limits to the flux from these sources are stated in all cases. A periodicity search is made on data for which the excess for a single transit of a particular source is above 3(
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余君岳 and Kwan-ngok Peter Yu. "The origin of extragalactic gamma rays." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31231469.

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Yu, Kwan-ngok Peter. "The origin of extragalactic gamma rays /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12362827.

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Books on the topic "Gamma ray sources"

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Cheng, K. S., and Gustavo E. Romero, eds. Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1995.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1995.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1994.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1994.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1994.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1995.

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A, Meegan C., and United States. National Aeronautics and Space Administration., eds. Do gamma-ray burst sources repeat? National Aeronautics and Space Administration, 1994.

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United States. National Aeronautics and Space Administration., ed. Multiwavelength observations of unidentified high energy gamma-ray sources: Annual status report for NAG 5-2051. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. Multiwavelength observations of unidentified high energy gamma-ray sources: Annual status report for NAG 5-2051. National Aeronautics and Space Administration, 1995.

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Book chapters on the topic "Gamma ray sources"

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Lu, T., Y. F. Huang, Z. G. Dai, and D. M. Wei. "Gamma-Ray Bursts." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_10.

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Thompson, David J. "Gamma Ray Pulsars." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_7.

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Moskalenko, Igor V., Andrew W. Strong, and Olaf Reimer. "Diffuse Gamma Rays." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_12.

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Grenier, Isabelle A. "Galactic Gamma-Ray Sources." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_3.

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Torres, Diego F. "Extragalactic Gamma-Ray Sources." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_4.

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Reimer, Olaf. "Unidentified Gamma-Ray Sources." In The Universe in Gamma Rays. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04593-0_13.

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Cheng, K. S., and Gustavo E. Romero. "Introduction." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_1.

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Reimer, Olaf. "Clusters of Galaxies at High Energy Gamma-Rays." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_11.

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Mukherjee, Reshmi, and Jules Halpern. "Multifrequency Strategies for the Identification of Gamma-Ray Sources." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_13.

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Weekes, Trevor C. "Future Ground-Based TeV Gamma-Ray Telescopes." In Cosmic Gamma-Ray Sources. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2256-2_14.

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Conference papers on the topic "Gamma ray sources"

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Chernyakova, Maria, and Denys Malyshev. "Gamma-ray binaries." In Multifrequency Behaviour of High Energy Cosmic Sources - XIII. Sissa Medialab, 2020. http://dx.doi.org/10.22323/1.362.0045.

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Fegan, S. J. "VHE observations of unidentified EGRET sources." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419417.

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Thompson, D. J. "Artifact sources near bright EGRET pulsars." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419480.

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Sturner, Steven J., and Charles D. Dermer. "Scattering atmospheres near gamma-ray burst sources." In Gamma-ray bursts. AIP, 1991. http://dx.doi.org/10.1063/1.42794.

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Punch, Michael. "TeV gamma-ray sources." In The international symposium on high energy gamma-ray astronomy. AIP, 2001. http://dx.doi.org/10.1063/1.1370816.

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Lamb, R. C. "GeV gamma-ray sources." In GeV-TeV gamma ray astrophysics workshop. AIP, 2000. http://dx.doi.org/10.1063/1.1291381.

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Chen, A. W. "Population studies of the gamma-ray sources." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419479.

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Tornikoski, M. "Possible new identifications for Southern EGRET sources." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419481.

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Vercellone, S. "Imaging of high energy sources with AGILE." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419496.

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Ruffert, Maximilian, and Hans-Thomas Janka. "Coalescing neutron stars as possible gamma-ray burst sources." In GAMMA-RAY BURSTS. ASCE, 1998. http://dx.doi.org/10.1063/1.55406.

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Reports on the topic "Gamma ray sources"

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Weaver, James T., Thomas P. Loftus, and Robert Loevinger. Calibration of gamma-ray-emitting brachytherapy sources. National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.sp.250-19.

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Howell, Calvin R., Mohammad W. Ahmed, Anuj J. Kapadia, and Ying K. Wu. International Workshop on the Next Generation Gamma-ray Sources. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1482379.

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Peng, F. Two-Component Jet Models of Gamma-Ray Burst Sources. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/839640.

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Torres, D. High-Latitude Molecular Clouds as Gamma-Ray Sources for GLAST. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/839757.

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Gibson, D. Novel Multiple-Gigahertz Electron Beams for Advanced X-Ray and Gamma-Ray Light Sources. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1178389.

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Gibson, Alexander. Mapping Correlation of Two Point Sources in the Gamma-Ray Sky. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1213163.

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Digel, S. Small Molecular Clouds at High Latitudes as Gamma-Ray Sources for GLAST. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/839933.

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Karam, Lisa R., Leticia Pibida, Michael P. Unterweger, and Larry L. Lucas. Gamma-ray emitting test sources for portal monitors used for homeland security. National Bureau of Standards, 2004. http://dx.doi.org/10.6028/nist.tn.1460.

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Semenov, V. A. Picosecond Pulse Recirculation for High Average Brightness Thomson Scattering-based Gamma-ray Sources. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/964528.

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Nelson, K., T. Gosnell, and D. Knapp. The Effect of Gamma-ray Detector Energy Resolution on the Ability to Identify Radioactive Sources. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/952090.

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