Results 1 to 10 of about 2,261,840 (225)

Telescope Concepts in Gamma-Ray Astronomy

, 2022
This chapter outlines the general principles for the detection and characterisation of high-energy $γ$-ray photons in the energy range from MeV to GeV. Applications of these fundamental photon-matter interaction processes to the construction of instruments for $γ$-ray astronomy are described, including a short review of past and present realisations of
Siegert, T., Horan, D., Kanbach, G.
openaire   +3 more sources

A Multiwavelength Investigation of PSR J2229+6114 and its Pulsar Wind Nebula in the Radio, X-Ray, and Gamma-Ray Bands

The Astrophysical Journal, 2023
G106.3+2.7, commonly considered to be a composite supernova remnant (SNR), is characterized by a boomerang-shaped pulsar wind nebula (PWN) and two distinct (“head” and “tail”) regions in the radio band. A discovery of very-high-energy gamma-ray emission (
I. Pope, K. Mori, M. Abdelmaguid, J. D. Gelfand, S. P. Reynolds, S. Safi-Harb, C. J. Hailey, H. An, NuSTAR Collaboration, P. Bangale, P. Batista, W. Benbow, J. H. Buckley, M. Capasso, J. L. Christiansen, A. J. Chromey, A. Falcone, Q. Feng, J. P. Finley, G. M Foote, G. Gallagher, W. F Hanlon, D. Hanna, O. Hervet, J. Holder, T. B. Humensky, W. Jin, P. Kaaret, M. Kertzman, D. Kieda, T. K. Kleiner, N. Korzoun, F. Krennrich, S. Kumar, M. J. Lang, G. Maier, C. E McGrath, C. L. Mooney, P. Moriarty, R. Mukherjee, S. O’Brien, R. A. Ong, N. Park, S. R. Patel, K. Pfrang, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, E. Roache, I. Sadeh, L. Saha, G. H. Sembroski, D. Tak, J. V. Tucci, A. Weinstein, D. A. Williams, J. Woo, VERITAS Collaboration   +59 more
doaj   +1 more source

Upper Limits on the Gamma-Ray Emission from the Microquasar V4641 Sgr

The Astrophysical Journal
Following a recent detection of TeV radiation by the Large High Altitude Air Shower Observatory and the High-Altitude Water Cherenkov Observatory, coincident with the direction of the microquasar V4641 Sgr, we search for possible GeV emission from this ...
Zihao Zhao, Jian Li, Diego F. Torres
doaj   +1 more source

Preflight Background Estimates for COSI

The Astrophysical Journal
The Compton Spectrometer and Imager (COSI) is a Compton telescope designed to survey the 0.2–5 MeV sky, consisting of a compact array of cross-strip germanium detectors.
Savitri Gallego, Uwe Oberlack, Jan Lommler, Christopher M. Karwin, Francesco Fenu, Valentina Fioretti, Andreas Zoglauer, F. M. Follega, A. Perinelli, Roberto Battiston, Roberto Iuppa, Steven E. Boggs, Saurabh Mittal, Pierre Jean, Carolyn Kierans, Dieter H. Hartmann, John A. Tomsick, (on behalf of the COSI Collaboration)   +17 more
doaj   +1 more source

Gamma-Ray Astronomy

, 2008
In this paper, I present a summary of the status of γ-ray astronomy in the very high energy band (E > 50GeV), as of early 2007. It covers a selection of results obtained from observations made by ground-based detectors using the atmospheric Cherenkov or air shower techniques, together with short descriptions of some of the present and future ...
openaire   +2 more sources

Very High-energy Gamma-Ray Episodic Activity of Radio Galaxy NGC 1275 in 2022–2023 Measured with MACE

The Astrophysical Journal Letters
The radio galaxy NGC 1275, located at the central region of Perseus cluster, is a well-known very high-energy (VHE) gamma-ray emitter. The Major Atmospheric Cherenkov Experiment Telescope has detected two distinct episodes of VHE ( E > 80 GeV) gamma-ray ...
S. Godambe, N. Mankuzhiyil, C. Borwankar, B. Ghosal, A. Tolamatti, M. Pal, P. Chandra, M. Khurana, P. Pandey, Z. A. Dar, S. Godiyal, J. Hariharan, Keshav Anand, S. Norlha, D. Sarkar, R. Thubstan, K. Venugopal, A. Pathania, S. Kotwal, Raj Kumar, N. Bhatt, K. Chanchalani, M. Das, K. K. Singh, K. K. Gour, M. Kothari, Nandan Kumar, Naveen Kumar, P. Marandi, C. P. Kushwaha, M. K. Koul, P. Dorjey, N. Dorji, V. R. Chitnis, R. C. Rannot, S. Bhattacharyya, N. Chouhan, V. K. Dhar, M. Sharma, K. K. Yadav   +39 more
doaj   +1 more source

TAIGA - a hybrid array for high energy gamma astronomy and cosmic ray physics

EPJ Web of Conferences, 2018
The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector are presented.
Budnev N., Astapov I., Bezyazeekov P., Boreyko V., Borodin A., Brueckner M., Chiavassa A., Dyachok A., Fedorov O., Gafarov A., Garmash A., Gorbunov N., Grebenyuk V., Gress O., Gress T., Grishin O., Grinyuk A., Haungs A., Hiller R., Horns D., Huege T., Kalmykov N., Kazarina Y., Kindin V., Kiryuhin S., Kirilenko P., Kleifges M., Kokoulin R., Kompaniets K., Korosteleva E., Kostunin D., Kozhin V., Kravchenko E., Kuzmichev L., Lemeshev Yu., Lenok V., Lubsandorzhiev B., Lubsandorzhiev N., Mirgazov R., Mirzoyan R., Monkhoev R., Osipova E., Pakhorukov A., Panasyuk M., Pankov L., Petrukhin A., Poleschuk V., Popescu M., Popova E., Porelli A., Postnikov E., Prosin V., Ptuskin V., Rjabov E., Rubtsov G., Pushnin A., Sagan Y., Sabirov B., Samoliga V., Schröder F., Semeney Yu., Silaev A., Silaev A., Sidorenkov A., Skurikhin A., Slunecka V., Sokolov A., Spiering C., Sveshnikova L., Tabolenko V., Tarashansky B., Tkachenko A., Tkachev L., Tluczykont M., Wischnewski R., Zagorodnikov A., Zhurov D., Zurbanov V., Yashin I.   +78 more
doaj   +1 more source

Sites for Gamma-ray Astronomy in Argentina

AIP Conference Proceedings, 2008
Submitted to Proceedings of "4th Heidelberg International Symposium on High Energy Gamma-Ray Astronomy 2008"
A. C. Rovero, G. E. Romero, I. Allekotte, X. Bertou, E. Colombo, A. Etchegoyen, B. Garcia, D. Garcia-Lambas, H. Levato, M. C. Medina, H. Muriel, P. Recabarren, Felix A. Aharonian, Werner Hofmann, Frank Rieger   +14 more
openaire   +4 more sources

Expectation for the Hard X-Ray and Gamma-Ray Emission from Pair-instability Supernovae

The Astrophysical Journal
Pair-instability supernovae (PISNe) are predicted thermonuclear explosions of massive stars with helium core masses exceeding ∼65 M _⊙ , and they synthesize substantial amounts of radioactive ^56 Ni ( M ( ^56 Ni) ∼ 60 M _⊙ in extreme cases).
Ryo Sawada
doaj   +1 more source

Ground-Based Gamma Ray Astronomy [PDF]

Brazilian Journal of Physics, 2014
This paper is the write-up of a rapporteur talk given by the author at the 33rd International Cosmic Ray Conference in Rio de Janeiro, Brazil, in 2013. It attempts to summarize results and developments in ground-based gamma-ray observations and instrumentation from among the $\sim300$ submissions to the gamma-ray sessions of the meeting.
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