نتایج جستجو برای: ray emission

تعداد نتایج: 447481  

1993
A. W. Strong

Diiuse galactic continuum-ray emission in the 0.75-30 MeV range from the inner Galaxy has been studied using data from COMPTEL on the Compton Observatory. Observations of the inner Galaxy from the Sky Survey have been used. The imaging properties of COMPTEL enable spatial analysis of the-ray distribution using model tting. A model based on atomic and molecular gas distributions in the Galaxy ha...

2002
Debra J. Wallace

Spatially resolved ROSAT X-ray and ground-based optical data for the southwestern region of the Cygnus Loop SNR reveal in unprecedented detail the very early stages of a blast wave interaction with an isolated interstellar cloud. Numerous internal cloud shock fronts near the upstream flow and along the cloud edges are visible optically as sharp filaments of enhanced Hα emission. Faint X-ray emi...

2002
Debra J. Wallace

Spatially resolved ROSAT X-ray and ground-based optical data for the southwestern region of the Cygnus Loop SNR reveal in unprecedented detail the very early stages of a blast wave interaction with an isolated interstellar cloud. Numerous internal cloud shock fronts near the upstream flow and along the cloud edges are visible optically as sharp filaments of enhanced Hα emission. Faint X-ray emi...

2000
John Hamilton-Taylor

Black particles, collected by filtration (1.2~pm pore size) from the anoxic waters of a soft-water lake, were examined by a scanning proton microprobe which permitted quantitative elemental analysis by proton-induced X-ray emission (PIXE) and Rutherford backscattering (RBS). There was a uniform distribution of sulfur across the filter, but Fe, and to a lesser extent, Mn, was localized in -5-pm-...

2008
Christoph Pfrommer

Complementary views of galaxy clusters in the radio synchrotron, hard X-ray inverse Compton, and high-energy γ-ray regimes are critical in calibrating them as high-precision cosmological probes. We present predictions for scaling relations between cluster mass and these non-thermal observables. To this end, we use high-resolution simulations of a sample of galaxy clusters spanning a mass range ...

Journal: :Physical review letters 2011
R Abbasi Y Abdou T Abu-Zayyad J Adams J A Aguilar M Ahlers K Andeen J Auffenberg X Bai M Baker S W Barwick R Bay J L Bazo Alba K Beattie J J Beatty S Bechet J K Becker K-H Becker M L Benabderrahmane S BenZvi J Berdermann P Berghaus D Berley E Bernardini D Bertrand D Z Besson D Bindig M Bissok E Blaufuss J Blumenthal D J Boersma C Bohm D Bose S Böser O Botner J Braun A M Brown S Buitink M Carson D Chirkin B Christy J Clem F Clevermann S Cohen C Colnard D F Cowen M V D'Agostino M Danninger J Daughhetee J C Davis C De Clercq L Demirörs O Depaepe F Descamps P Desiati G de Vries-Uiterweerd T DeYoung J C Díaz-Vélez M Dierckxsens J Dreyer J P Dumm R Ehrlich J Eisch R W Ellsworth O Engdegård S Euler P A Evenson O Fadiran A R Fazely A Fedynitch T Feusels K Filimonov C Finley T Fischer-Wasels M M Foerster B D Fox A Franckowiak R Franke T K Gaisser J Gallagher M Geisler L Gerhardt L Gladstone T Glüsenkamp A Goldschmidt J A Goodman D Grant T Griesel A Gross S Grullon M Gurtner C Ha A Hallgren F Halzen K Han K Hanson D Heinen K Helbing P Herquet S Hickford G C Hill K D Hoffman A Homeier K Hoshina D Hubert W Huelsnitz J-P Hülss P O Hulth K Hultqvist S Hussain A Ishihara J Jacobsen G S Japaridze H Johansson J M Joseph K-H Kampert A Kappes T Karg A Karle J L Kelley N Kemming P Kenny J Kiryluk F Kislat S R Klein J-H Köhne G Kohnen H Kolanoski L Köpke S Kopper D J Koskinen M Kowalski T Kowarik M Krasberg T Krings G Kroll K Kuehn T Kuwabara M Labare S Lafebre K Laihem H Landsman M J Larson R Lauer R Lehmann J Lünemann J Madsen P Majumdar A Marotta R Maruyama K Mase H S Matis K Meagher M Merck P Mészáros T Meures E Middell N Milke J Miller T Montaruli R Morse S M Movit R Nahnhauer J W Nam U Naumann P Niessen D R Nygren S Odrowski A Olivas M Olivo A O'Murchadha M Ono S Panknin L Paul C Pérez de los Heros J Petrovic A Piegsa D Pieloth R Porrata J Posselt P B Price M Prikockis G T Przybylski K Rawlins P Redl E Resconi W Rhode M Ribordy A Rizzo J P Rodrigues P Roth F Rothmaier C Rott T Ruhe D Rutledge B Ruzybayev D Ryckbosch H-G Sander M Santander S Sarkar K Schatto T Schmidt A Schoenwald A Schukraft A Schultes O Schulz M Schunck D Seckel B Semburg S H Seo Y Sestayo S Seunarine A Silvestri A Slipak G M Spiczak C Spiering M Stamatikos T Stanev G Stephens T Stezelberger R G Stokstad S Stoyanov E A Strahler T Straszheim G W Sullivan Q Swillens H Taavola I Taboada A Tamburro O Tarasova A Tepe S Ter-Antonyan S Tilav P A Toale S Toscano D Tosi D Turčan N van Eijndhoven J Vandenbroucke A Van Overloop J van Santen M Vehring M Voge B Voigt C Walck T Waldenmaier M Wallraff M Walter C Weaver C Wendt S Westerhoff N Whitehorn K Wiebe C H Wiebusch D R Williams R Wischnewski H Wissing M Wolf K Woschnagg C Xu X W Xu G Yodh S Yoshida P Zarzhitsky

IceCube has become the first neutrino telescope with a sensitivity below the TeV neutrino flux predicted from gamma-ray bursts if gamma-ray bursts are responsible for the observed cosmic-ray flux above 10(18)  eV. Two separate analyses using the half-complete IceCube detector, one a dedicated search for neutrinos from pγ interactions in the prompt phase of the gamma-ray burst fireball and the o...

2001
Patrick Slane

Supernova remnants have long been suggested as a class of potential counterparts to unidentified γ-ray sources. The mechanisms by which such γ-rays can arise may include emission from a pulsar associated with a remnant, or a variety of processes associated with energetic particles accelerated by the SNR shock. Imaging and spectral observations in the X-ray band can be used to identify propertie...

2008
D. M. Russell R. P. Fender P. G. Jonker

Optical/near-infrared (optical/NIR; OIR) light from low-mass neutron star X-ray binaries (NSXBs) in outburst is traditionally thought to be thermal emission from the accretion disc. Here we present a comprehensive collection of quasi-simultaneous OIR and X-ray data from 19 low-magnetic field NSXBs, including new observations of three sources: 4U 0614+09, LMC X–2 and GX 349+2. The average radio–...

2009
N. Rea M. A. McLaughlin B. M. Gaensler P. O. Slane L. Stella S. P. Reynolds

We report on the discovery of extended X-ray emission around the high magnetic field Rotating Radio Transient J1819–1458. Using a 30 ks Chandra ACIS-S observation, we found significant evidence for extended X-ray emission with a peculiar shape: a compact region out to ∼5.5, and more diffuse emission extending out to ∼13 from the source. The most plausible interpretation is a nebula somehow powe...

1997
M. R. Merrifield

It is difficult to detect X-ray emission associated with galaxies in rich clusters because the X-ray images of the clusters are dominated by the emission from their hot intracluster media (ICM). Only the nearby Virgo cluster provides us with information about the X-ray properties of galaxies in clusters. Here we report on the analysis of a deep ROSAT HRI image of the moderately-rich cluster, Ab...

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