Results 21 to 30 of about 59,762 (195)

AGILE and gamma-ray astrophysics

Nuclear Physics B - Proceedings Supplements, 2003
The study of rays is fundamental for our understanding of the universe: rays probe the most energetic phenomena occurring in nature, and several signatures of new physics are associated with the emission of rays. The main science objectives and the status of the new generation high-energy gamma-ray astrophysics experiment AGILE are presented.
Longo, F., Argan, A., Auricchio, N., Barbiellini, G., Bulgarelli, A., Caraveo, P., Celesti, E., Chen, A., Cocco, V., Costa, E., di Cocco, G., Fedel, G., Feroci, M., Fiorini, M., Froysland, T., Galli, M., Gianotti, F., Giuliani, A., Labanti, C., Lapshov, I   +19 more
  +8 more sources

Gamma-ray spectroscopy in astrophysics [PDF]

Nature, 1978
Experimental and theoretical aspects of gamma ray spectroscopy in high energy astrophysics are discussed. Line spectra from solar, stellar, planetary, and cosmic gamma rays are examined as well as HEAO investigations, the prospects of a gamma ray observatory, and follow-on X-ray experiments in space.
R. Ramaty, T. L. Kline, R. Weaver
openaire   +1 more source

Gamma-ray vortices from nonlinear inverse Thomson scattering of circularly polarized light

Scientific Reports, 2017
Inverse Thomson scattering is a well-known radiation process that produces high-energy photons both in nature and in the laboratory. Nonlinear inverse Thomson scattering occurring inside an intense light field is a process which generates higher harmonic
Yoshitaka Taira, Takehito Hayakawa, Masahiro Katoh   +2 more
doaj   +1 more source

Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]

, 2001
We present a study of the unidentified gamma-ray source 3EG J0542+2610. This source is spatially superposed to the supernova remnant G180.0-1.7, but its time variability makes unlikely a physical link.
Bernado, M. M. Kaufman, Combi, Jorge A., Romero, Gustavo E., Torres, Diego F.   +3 more
core   +2 more sources

BART: The Czech Autonomous Observatory

Advances in Astronomy, 2010
The High Energy Astrophysics group of the stellar department of the Astronomical Institute in Ondřejov operates two small aperture robotic telescopes called BART and D50.
Martin Nekola, René Hudec, Martin Jelínek, Petr Kubánek, Jan Štrobl, Cyril Polášek   +5 more
doaj   +1 more source

Ultra-sensitive in-beam gamma-ray spectroscopy for nuclear astrophysics at LUNA

, 2008
Ultra-sensitive in-beam gamma-ray spectroscopy studies for nuclear astrophysics are performed at the LUNA (Laboratory for Underground Nuclear Astrophysics) 400 kV accelerator, deep underground in Italy's Gran Sasso laboratory.
A. CACIOLLI, A. FORMICOLA, A. GUGLIELMETTI, A. LEMUT, AND H.P. TRAUTVETTER, B. LIMATA, C. BROGGINI, C. GUSTAVINO, C. ROLFS, C. ROSSI ALVAREZ, D. BEMMERER, E. SOMORJAI, F. CONFORTOLA, F. STRIEDER, F. TERRASI, G. GERVINO, G. IMBRIANI, GY. GYURKY, H. COSTANTINI, L. AGOSTINO, M. JUNKER, M. LAUBENSTEIN, M. MARTA, O. STRANIERO, P. BEZZON, P. CORVISIERO, P. PRATI, R. BONETTI, R. MENEGAZZO, V. LOZZA, V. ROCA, Z. ELEKES, ZS. FULOP   +32 more
core   +1 more source

A Plasma Instability Theory of Gamma-Ray Burst Emission [PDF]

, 1999
A new theory for gamma-ray burst radiation is presented. In this theory, magnetic fields and relativistic electrons are created through plasma processes arising as a relativistic shell passes through the interstellar medium.
J. J. Brainerd, Rees M. J.
core   +3 more sources

VHE gamma-ray spectral properties of the blazars Mrk 501 and Mrk 421 from CAT observations in 1997 and 1998 [PDF]

, 1999
The Very High Energy (VHE) gamma-ray emission of the BL Lacertae objects Markarian 501 and Markarian 421 has been observed by the CAT Imaging Atmospheric Cherenkov Telescope in 1997 and 1998.
Piron, Frederic
core   +2 more sources

Gamma-ray Bursts: 50 Years and Counting!

Universe
Gamma-ray bursts were discovered by the Vela satellites in the late 1960s, but they were announced for the first time exactly 50 years ago, in 1973. The history of our understanding of gamma-ray bursts can be subdivided into several eras.
Alessandro Armando Vigliano, Francesco Longo   +1 more
doaj   +1 more source

Compton Imaging of MeV Gamma-Rays with the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT)

, 2008
The Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) is the first realization of a liquid xenon time projection chamber for Compton imaging of MeV gamma-ray sources in astrophysics.
A. Curioni, Aprile, Aprile, Barrett, Boggs, Curioni, Doke, E. Aprile, Hagiwara, K.L. Giboni, M. Kobayashi, Press, S. Zhang, Schmid, Takahashi, U.G. Oberlack, van der Marel   +16 more
core   +1 more source