Results 1 to 10 of about 965 (178)

Gamma-Ray Astrophysics in the Time Domain [PDF]

Galaxies, 2019
The last few years have seen gamma-ray astronomy maturing and advancing in the field of time-domain astronomy, utilizing source variability on timescales over many orders of magnitudes, from a decade down to a few minutes and shorter, depending on the ...
Frank M. Rieger
doaj   +3 more sources

The high energy X-ray probe (HEX-P): Galactic PeVatrons, star clusters, superbubbles, microquasar jets, and gamma-ray binaries

Frontiers in Astronomy and Space Sciences, 2023
HEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10″ FWHM) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current facilities (including XMM-Newton and NuSTAR) to enable ...
Kaya Mori, Stephen Reynolds, Hongjun An, Aya Bamba, Aya Bamba, Aya Bamba, Roman Krivonos, Naomi Tsuji, Moaz Abdelmaguid, Jason Alford, Priyadarshini Bangale, Silvia Celli, Rebecca Diesing, Rebecca Diesing, Rebecca Diesing, Jordan Eagle, Chris L. Fryer, Stefano Gabici, Joseph Gelfand, Brian Grefenstette, Javier Garcia, Chanho Kim, Sajan Kumar, Ekaterina Kuznetsova, Brydyn Mac Intyre, Kristin Madsen, Silvia Manconi, Yugo Motogami, Hayato Ohsumi, Barbara Olmi, Barbara Olmi, Jaegeun Park, Gabriele Ponti, Gabriele Ponti, Toshiki Sato, Ruo-Yu Shang, Daniel Stern, Yukikatsu Terada, Yukikatsu Terada, Jooyun Woo, George Younes, George Younes, Andreas Zoglauer   +42 more
doaj   +1 more source

AGILE DATA CENTER AT ASDC AND AGILE HIGHLIGHTS

Acta Polytechnica, 2013
We present an overview of the main AGILE Data Center activities and the AGILE scientific highlights during the first 5 years of operations. AGILE is an ASI space mission in joint collaboration with INAF, INFN and CIFS, dedicated to the observation of the
Carlotta Pittori
doaj   +1 more source

Deciphering the ∼18 TeV Photons from GRB 221009A

The Astrophysical Journal Letters, 2023
On 2022 October 9, an extremely powerful gamma-ray burst, GRB 221009A, was detected by several instruments. Despite being obstructed by the Milky Way galaxy, its afterglow outburst outshone all other GRBs seen before.
Sarira Sahu, B. Medina-Carrillo, G. Sánchez-Colón, Subhash Rajpoot   +3 more
doaj   +1 more source

(Very)-high-energy gamma-ray astrophysics: The future

EPJ Web of Conferences, 2016
Several projects planned or proposed can significantly expand our knowledge of the high-energy Universe in gamma rays. Construction of the Cherenkov telescope array CTA is started, and other detectors are planned which will use the reconstruction of ...
Angelis Alessandro De
doaj   +1 more source

Cosmic Ray Astrophysics using The High Altitude Water Cherenkov (HAWC) Observatory in México

EPJ Web of Conferences, 2017
The High-Altitude Water Cherenkov (HAWC) TeV gamma–ray Observatory in México is ready to search and study gamma-ray emission regions, extremely high-energy cosmic-ray sources, and to identify transient phenomena.
de la Fuente Eduardo, Díaz–Vélez Juan Carlos, Almada Alberto Hernández, Nigoche–Netro Alberto   +3 more
doaj   +2 more sources

Astrophysics Without Black Holes, and Without Extragalactic Gamma-Ray Bursts

Acta Polytechnica CTU Proceedings, 2014
Contrary to common belief, it is argued that our Universe contains neither Black Holes, nor Extracalactic Gamma-Ray Bursts.
Wolfgang Kundt
doaj   +1 more source

The Formation of Hard Very High Energy Spectra from Gamma-ray Burst Afterglows via Two-zone Synchrotron Self-Compton Emission

The Astrophysical Journal, 2023
Electron Compton scattering of target photons into the gamma-ray energy band (inverse Compton scattering; IC) is commonly expected to dominate the very high energy (VHE) spectra in gamma-ray bursts (GRBs) especially during the afterglow phase.
Dmitry Khangulyan, Andrew M. Taylor, Felix Aharonian   +2 more
doaj   +1 more source

AGILE Highlights after Six Years in Orbit

Acta Polytechnica CTU Proceedings, 2014
AGILE is an ASI space mission in collaboration with INAF, INFN and CIFS, dedicated to the observation of the gamma-ray Universe in the 30 MeV - 50 GeV energy range, with simultaneous X-ray imaging capability in the 18-60 keV band. The AGILE satellite was
Carlotta Pittori
doaj   +1 more source

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