Results 31 to 40 of about 113,730 (333)

AGILE Detection of Gamma-Ray Sources Coincident with Cosmic Neutrino Events [PDF]

Astrophysical Journal, 2018
The origin of cosmic neutrinos is still largely unknown. Using data obtained by the gamma-ray imager on board the Astro-rivelatore Gamma a Immagini Leggero (AGILE) satellite, we systematically searched for transient gamma-ray sources above 100 MeV that ...
F. Lucarelli, F. Lucarelli, M. Tavani, G. Piano, A. Bulgarelli, I. Donnarumma, F. Verrecchia, F. Verrecchia, C. Pittori, C. Pittori, L. A. Antonelli, A. Argan, G. Barbiellini, P. Caraveo, M. Cardillo, P. Cattaneo, A. Chen, S. Colafrancesco, S. Colafrancesco, E. Costa, E. Costa, E. Monte, G. Cocco, A. Ferrari, V. Fioretti, M. Galli, P. Giommi, A. Giuliani, P. Lipari, F. Longo, S. Mereghetti, A. Morselli, F. Paoletti, N. Parmiggiani, A. Pellizzoni, P. Picozza, M. Pilia, A. Rappoldi, A. Trois, A. Ursi, S. Vercellone, V. Vittorini   +41 more
semanticscholar   +1 more source

New Mission Concept: Compton Telescope with Coded Aperture Mask (GECCO) for MeV Gamma-ray Astronomy

International Conference on Rebooting Computing, 2023
The Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO) is a novel Explorer-class concept for a next-generation telescope covering the poorly explored hard X-ray and soft gamma-ray energy regimes.
A. Moiseev
semanticscholar   +1 more source

Search and identification of transient and variable radio sources using MeerKAT observations: a case study on the MAXI J1820+070 field [PDF]

, 2022
Many transient and variable sources detected at multiple wavelengths are also observed to vary at radio frequencies. However, these samples are typically biased towards sources that are initially detected in wide-field optical, X-ray or gamma-ray surveys.
A. Rowlinson, J. Meijn, J. Bright, A. V. D. Horst, S. Chastain, S. Fijma, R. Fender, I. Heywood, R. Wijers, P. Woudt, A. Andersson, G. Sivakoff, E. Tremou, L. Driessen   +13 more
semanticscholar   +1 more source

The X/Gamma-ray Imaging Spectrometer (XGIS) on-board THESEUS: design, main characteristics, and concept of operation [PDF]

Astronomical Telescopes + Instrumentation, 2020
THESEUS (Transient High Energy Sky and Early Universe Surveyor) is one of the three missions selected by ESA as fifth medium class mission (M5) candidates in its Cosmic Vision science program, currently under assessment in a phase A study with a planned ...
C. Labanti, Lorenzo Amati, F. Frontera, S. Mereghetti, J. Gasent-Blesa, C. Tenzer, P. Orleanski, I. Kuvvetli, Riccardo Campana, F. Fuschino, L. Terenzi, E. Virgilli, G. Morgante, M. Orlandini, R. C. Butler, John B. Stephen, N. Auricchio, A. D. Rosa, Vanni Da Ronco, F. Evangelisti, M. Melchiorri, S. Squerzanti, Mauro Fiorini, G. Bertuccio, F. Mele, M. Gandola, P. Malcovati, M. Grassi, P. Bellutti, G. Borghi, F. Ficorella, A. Picciotto, Vittorio Zanini, N. Zorzi, E. Demenev, I. Rashevskaya, A. Rachevski, G. Zampa, A. Vacchi, N. Zampa, G. Baldazzi, G. Rosa, G. Sottile, A. Volpe, M. Winkler, V. Reglero, P. Connell, B. Pinazo-Herrero, Javier Navarro-Gonz'alez, Pedro Rodr'iguez-Mart'inez, A. Castro-Tirado, A. Santangelo, P. Hedderman, P. Lorenzi, P. Sarra, S. Pedersen, D. Tcherniak, C. Guidorzi, Piero Rosati, A. Trois, R. Piazzolla   +60 more
semanticscholar   +1 more source

GeV Gamma-Ray Sources [PDF]

, 2000
We report on the preliminary extension of our work on cataloging the GeV sky to approximately 7 years of CGRO/EGRET observations with special emphasis on a search for transient sources. The search method and significance levels are presented. Our initial
Lamb, R. C., Macomb, D. J.
core   +1 more source

Across the soft gamma-ray regime: utilizing simultaneous detections in the Compton Spectrometer and Imager (COSI) and the Background and Transient Observer (BTO) to understand astrophysical transients [PDF]

Astronomical Telescopes + Instrumentation
The Compton Spectrometer and Imager (COSI) is a NASA funded Small Explorer (SMEX) mission slated to launch in 2027. COSI will house a wide-field gamma-ray telescope designed to survey the entire sky in the 0.2-5 MeV range.
H. Gulick, Eliza Neights, Samer Al Nussirat, Claire Chen, Kaylie Ching, Cassandra Dove, Alyson Joens, C. Kierans, Hubert Liu, Israel Martinez, Tomas Mician, Shunsaku Nagasawa, Shreya Nandyala, Isabel Schmidtke, Derek Shah, A. Zoglauer, Kazuhiro Nakazawa, Tadayuki Takahashi, J. M. Martínez Oliveros, J. Tomsick   +19 more
semanticscholar   +1 more source

A physical background model for the Fermi Gamma-ray Burst Monitor [PDF]

Astronomy & Astrophysics, 2020
We present the first physically motivated background model for the Gamma-ray Burst Monitor (GBM) on board the Fermi satellite. Such a physically motivated background model has the potential to significantly improve the scientific output of Fermi/GBM, as ...
B. Biltzinger, F. Kunzweiler, J. Greiner, K. Toelge, J. Burgess   +4 more
semanticscholar   +1 more source

The Fermi Gamma-ray Burst Monitor: Results from the first two years [PDF]

, 2011
In the first two years since the launch of the Fermi Observatory, the Gamma-ray Burst Monitor (GBM) has detected over 500 Gamma-Ray Bursts (GRBs), of which 18 were confidently detected by the Large Area Telescope (LAT) above 100 MeV.
BISSALDI E., on behalf of the Fermi GBM Collaboration   +1 more
core   +2 more sources

Hybrid Emission Modeling of GRB 221009A: Shedding Light on TeV Emission Origins in Long GRBs

The Astrophysical Journal, 2023
Observations of long-duration gamma-ray bursts (GRBs) with TeV emission during their afterglow have been on the rise. Recently, GRB 221009A, the most energetic GRB ever observed, was detected by the Large High Altitude Air Shower Observatory experiment ...
Hebzibha Isravel, Damien Bégué, Asaf Pe’er   +2 more
doaj   +1 more source

Detection of very-high-energy gamma-ray transients with monitoring facilities [PDF]

, 2020
The study of the sky in Very High Energy gamma rays (VHE, E > 100 GeV) has led to the identification of a wealth of processes that are responsible for the acceleration of particles at the highest observed energies within the Milky Way and beyond ...
G. L. Mura, G. Chiaro, R. Conceiccao, A. Angelis, M. Pimenta, B. Tom'e   +5 more
semanticscholar   +1 more source