Results 151 to 160 of about 208,249 (317)

A Study on the Line of Sight to Galaxies Detected at Gamma-Ray Energies

The Astrophysical Journal Letters
The large-scale universal structure comprises strands of dark matter and galaxies with large underdense volumes known as voids. We measure the fraction of the line of sight that intersects voids for active galactic nuclei (AGN) detected by Fermi Large ...
Amy Furniss, Josepf N. Amador, Olivier Hervet, Ollie Jackson, David A. Williams   +4 more
doaj   +1 more source

Columba-Hypatia: Astronomy for Peace [PDF]

arXiv, 2018
"Columba-Hypatia: Astronomy for Peace" is a joint astronomy outreach project by GalileoMobile and the Association for Historical Dialogue and Research (AHDR) which takes place on the island of Cyprus. The project aims to inspire young people, through astronomy, to be curious about science and the cosmos, while also using astronomy as a tool for ...
arxiv  

Possibility of experimental ultrahigh-energy gamma-ray astronomy [PDF]

, 1987
E.A. Mamidzhanyan, S.I. Nikol'skii
openalex   +1 more source

Visualization of reproducible object colors in standard color spaces using the gamut ring intersection

Journal of the Society for Information Display, Volume 33, Issue 4, Page 231-245, April 2025.
Illustration of the framework for the gamut ring intersection between the BT.2020 UHDTV gamut and the optimal color gamut. The tinted color denotes the intersection (or coverage), and the gray color denotes the absence of intersection (no coverage). An animated version of this system is available in the Supporting Information.
Kenichiro Masaoka, Euan Smith, Karl Lang, Brian Berkeley, Johan Bergquist, John Penczek   +5 more
wiley   +1 more source

Imaging and Spectral Fitting of Bright Gamma-Ray Sources with the COSI Balloon Payload

The Astrophysical Journal
The Compton Spectrometer and Imager balloon payload (COSI-Balloon) is a wide field-of-view Compton gamma-ray telescope that operates in the 0.2–5 MeV bandpass.
Jarred M. Roberts, Steven Boggs, Thomas Siegert, John A. Tomsick, Marco Ajello, Peter von Ballmoos, Jacqueline Beechert, Floriane Cangemi, Savitri Gallego, Pierre Jean, Chris Karwin, Carolyn Kierans, Hadar Lazar, Alex Lowell, Israel Martinez Castellanos, Sean Pike, Clio Sleator, Yong Sheng, Hiroki Yoneda, Andreas Zoglauer   +19 more
doaj   +1 more source

The CAT imaging telescope for very-high-energy gamma-ray astronomy [PDF]

, 1998
Aurélien Barrau, R. Bazer‐Bachi, E. Beyer, H. Cabot, M. Cerutti, L.‐M. Chounet, G. Debiais, B. Degrange, H. Delchini, J.P. Denance, G. Descotes, J. P. Dezalay, A. Djannati-Ataı̈, D. Dumora, P. Espigat, B. Fabre, P. Fleury, G. Fontaine, R. George, C. Ghesquière, J. Gilly, P. Goret, C. Gouiffès, J.-C. Gouillaud, C. Grégory, I. A. Grenier, L. Iacoucci, L. Kalt, S. Le Bohec, Isabelle Malet, C. Meynadier, J.P. Mols, P. Mora de Freitas, R. Morano, G. Morinaud, F. Münz, M. Palatka, T. Palfrey, E. Paré, Y. Pons, M. Punch, J. Québert, K. Ragan, C. Renault, M. Rivoal, L. Rob, P. Schovánek, D. A. Smith, A. Tabary, J.‐P. Tavernet, F. Toussenel, J. Vrána   +51 more
openalex   +1 more source

The status of gamma-ray astronomy

, 2011
Gamma-ray studies are an essential tool in our search for the origin of cosmic rays. Instruments like the Fermi-LAT, H.E.S.S., MAGIC and VERITAS have revolutionized our understanding of the high energy Universe. This paper describes the status of the very rich field of gamma-ray astrophysics that contains a wealth of data on Galactic and extragalactic ...
openaire   +3 more sources

Detection of an internal density change in an anthropomorphic head phantom via tracking of charged nuclear fragments in carbon‐ion radiotherapy

Medical Physics, Volume 52, Issue 4, Page 2399-2411, April 2025.
Abstract Background Carbon‐ion radiotherapy provides steep dose gradients that allow the simultaneous application of high tumor doses as well as the sparing of healthy tissue and radio‐sensitive organs. However, even small anatomical changes may have a severe impact on the dose distribution because of the finite range of ion beams.
Luisa Schweins, Rebekka Kirchgässner, Pamela Ochoa‐Parra, Marcus Winter, Semi Harrabi, Andrea Mairani, Oliver Jäkel, Jürgen Debus, Mária Martišíková, Laurent Kelleter   +9 more
wiley   +1 more source

Origin of hump in lateral distribution of Cherenkov photon density generated by gamma cosmic ray and study of its characteristics

Iranian Journal of Physics Research, 2010
Energetic secondary particles in gamma and hadron initiated showers can generate Cherenkov photons. Using CORSIKA code and simulation data, different characteristics of lateral distribution of Cherenkov photon density are studied. In particular, physical
G Rastegarzadeh, M Najmi
doaj  

Supernovae as the Site of ther‐Process: Implications for Gamma‐Ray Astronomy [PDF]

, 1998
Y.‐Z. Qian, P. Vogel, G. J. Wasserburg
openalex   +1 more source