Results 21 to 30 of about 208,249 (317)

The Crab Pulsar and Nebula as Seen in Gamma-Rays

Universe, 2021
Slightly more than 30 years ago, Whipple detection of the Crab Nebula was the start of Very High Energy gamma-ray astronomy. Since then, gamma-ray observations of this source have continued to provide new surprises and challenges to theories, with the ...
Elena Amato, Barbara Olmi
doaj   +1 more source

Tunka Advanced Instrument for cosmic rays and Gamma Astronomy (TAIGA): Status, results and perspectives

EPJ Web of Conferences, 2017
We present the current status of high-energy cosmic-ray physics and gamma-ray astronomy at the Tunka Astrophysical Center (AC). This complex is located in the Tunka Valley, about 50 km from Lake Baikal.
Kuzmichev L., Astapov I., Bezyazeekov P., Boreyko V., Borodin A., Brückner M., Budnev N., Chiavassa A., Gress O., Gress T., Grishin O., Dyachok A., Epimakhov S., Fedorov O., Gafarov A., Grebenyuk V., Grinyuk A., Haungs A., Horns D., Huege T., Ivanova A., Jurov D., Kalmykov N., Kazarina Y., Kindin V., Kiryuhin V., Kokoulin R., Kompaniets K., Korosteleva E., Kostunin D., Kozhin V., Kravchenko E., Kunnas M., Lenok V., Lubsandorzhiev B., Lubsandorzhiev N., Mirgazov R., Mirzoyan R., Monkhoev R., Nachtigal R., Osipova E., Pakharukov A., Panasyuk M., Pankov L., Petrukhin A., Poleschuk V., Popesku M., Popova E., Porelli A., Postnikov E., Prosin V., Ptuskin V., Pushnin A., Rubtsov G., Ryabov E., Sagan Y., Samoliga V., Schröder F.G., Semeney Yu., Silaev A., Silaev A., Sidorenko A., Skurikhin A., Slunecka V., Sokolov A., Spiering C., Sveshnikova L., Sulakov V., Tabolenko V., Tarashansky B., Tkachenko A., Tkachev L., Tluczykont M., Wischnewski R., Zagorodnikov A., Zurbanov V., Yashin I.   +76 more
doaj   +2 more sources

Galactic Diffuse γ-Ray Emission from GeV to PeV Energies in Light of Up-to-date Cosmic-Ray Measurements

The Astrophysical Journal, 2023
Diffuse γ -ray emission between 10 and 1000 TeV from the Galactic plane was recently measured by the Large High Altitude Air Shower Observatory (LHAASO).
Rui Zhang, Xiaoyuan Huang, Zhi-Hui Xu, Shiping Zhao, Qiang Yuan   +4 more
doaj   +1 more source

Predicting community college astronomy performance through logistic regression [PDF]

Physical Review Physics Education Research.19(2023), 2023
The present study examined demographic and academic predictors of astronomy performance of community college students enrolled in astronomy courses in a large suburban community college. The theoretical framework was based upon a deconstructive approach for predicting community college performance whereby students academic pathways through higher ...
arxiv   +1 more source

Gamma ray astronomy with IceCube [PDF]

Journal of Cosmology and Astroparticle Physics, 2003
We demonstrate that the South Pole kilometer-scale neutrino observatory IceCube can detect multi-TeV gamma rays continuously over a large fraction of the southern sky. While not as sensitive as pointing atmospheric Cerenkov telescopes, IceCube can roughly match the sensitivity of Milagro.
Francis Halzen, Dan Hooper
openaire   +4 more sources

A General Overview for Localizing Short Gamma-Ray Bursts with a CubeSat Mega-Constellation

Frontiers in Astronomy and Space Sciences, 2020
The gamma-ray burst monitor (GBM) on the Fermi Gamma-Ray Space Telescope, for the first time, detected a short gamma ray burst (SGRB) signal that accompanies a gravitational wave signal GW170817 in 2017.
Fadil Inceoglu, Fadil Inceoglu, Fadil Inceoglu, Néstor J. Hernández Marcano, Rune H. Jacobsen, Christoffer Karoff   +5 more
doaj   +1 more source

Gamma ray astronomy [PDF]

Vistas in Astronomy, 1982
Cosmic gamma rays, the physical processes responsible for their production and the astrophysical sites from which they were seen are reported. The bulk of the observed gamma ray emission is in the photon energy range from about 0.1 MeV to 1 GeV, where observations are carried out above the atmosphere.
A. W. Wolfendale, B.P. Houston
openaire   +4 more sources

Radio and γ-ray Evidence for the Supernova Origin of High-velocity Cloud Complex M

The Astrophysical Journal, 2023
Using λ 21 cm galactic neutral hydrogen data from the HI4PI survey and 0.75–30 MeV γ -ray emission from the Imaging Compton Telescope, we have searched for the origin event that accelerated high-velocity cloud Complex M.
J. T. Schmelz, G. L. Verschuur
doaj   +1 more source

On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)

Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022
Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley   +1 more source

AGILE Gamma-Ray Detection of the Exceptional GRB 221009A

The Astrophysical Journal Letters, 2023
Gamma-ray emission in the MeV–GeV range from explosive cosmic events is of invaluable relevance to understanding physical processes related to the formation of neutron stars and black holes.
Marco Tavani, Giovanni Piano, Andrea Bulgarelli, Luca Foffano, Alessandro Ursi, Francesco Verrecchia, Carlotta Pittori, Claudio Casentini, Andrea Giuliani, Francesco Longo, Gabriele Panebianco, Ambra Di Piano, Leonardo Baroncelli, Valentina Fioretti, Nicolò Parmiggiani, Andrea Argan, Alessio Trois, Stefano Vercellone, Martina Cardillo, Lucio Angelo Antonelli, Guido Barbiellini, Patrizia Caraveo, Paolo W. Cattaneo, Andrew W. Chen, Enrico Costa, Ettore Del Monte, Guido Di Cocco, Immacolata Donnarumma, Yuri Evangelista, Marco Feroci, Fulvio Gianotti, Claudio Labanti, Francesco Lazzarotto, Paolo Lipari, Fabrizio Lucarelli, Martino Marisaldi, Sandro Mereghetti, Aldo Morselli, Luigi Pacciani, Alberto Pellizzoni, Francesco Perotti, Piergiorgio Picozza, Maura Pilia, Massimo Rapisarda, Andrea Rappoldi, Alda Rubini, Paolo Soffitta, Massimo Trifoglio, Valerio Vittorini, Fabio D’Amico   +49 more
doaj   +1 more source