Results 111 to 120 of about 638,354 (389)

Gamma-ray sources at high latitudes (Extragalactic gamma-ray sources)

, 2003
This Chapter provides a review of $ $-ray sources lying at high Galactic latitudes. Their statistical properties and variability status, as well as studies involving cross correlations with lower frequency catalogs and multiwavelength observations, are summarized.
openaire   +2 more sources

Source Density Evolution of Gamma‐Ray Bursts

The Astrophysical Journal, 1999
12 pages, 4 figures, accepted by ...
Robert J. Nemiroff, H. Che, Y. Yang
openaire   +3 more sources

On the Deformation Behavior of Metastable CrMnNi Steels Processed by Directed Energy Deposition in Different Temperature Regimes

Advanced Engineering Materials, EarlyView.
In the present study, metastable CrMnNi steels with varying chemical compositions and a concomitantly altered stacking fault energy are processed via directed energy deposition and afterwards tested via tensile tests at different temperatures. The present study shows the influence of the manufacturing process on the elemental deformation mechanisms for
Julia Richter, Thomas Wegener, Florian Stredak, Gert Bartzsch, Steffen Scherbring, Javad Mola, Olena Volkova, Stefan Böhm, Thomas Niendorf   +8 more
wiley   +1 more source

A complete sample of LSP blazars fully described in $\gamma$-rays. New $\gamma$-ray detections and associations with Fermi-LAT

, 2018
We study the $\gamma$-ray and broadband spectral energy distribution (SED) properties of a complete sample of 104 bright, radio-selected low-synchrotron peaked (LSP) blazars.
Arsioli, B., Polenta, G.
core   +1 more source

First AGILE catalog of high-confidence gamma-ray sources [PDF]

, 2009
We present the first catalog of high-confidence γ-ray sources detected by the AGILE satellite during observations performed from July 9, 2007 to June 30, 2008. Cataloged sources were detected by merging all the available data over the entire time period.
C. Pittori, F. Verrecchia, A. Chen, A. Bulgarelli, A. Pellizzoni, A. Giuliani, S. Vercellone, F. Longo, M. Tavani, P. Giommi, G. Barbiellini, M. Trifoglio, F. Gianotti, A. Argan, A. Antonelli, F. Boffelli, P. Caraveo, P. Cattaneo, V. Cocco, S. Colafrancesco, T. Contessi, E. Costa, S. Cutini, F. D’Ammando, E. Monte, G. D. Paris, G. Cocco, G. Persio, I. Donnarumma, Y. Evangelista, G. Fanari, M. Feroci, A. Ferrari, M. Fiorini, F. Fornari, F. Fuschino, T. Froysland, M. Frutti, M. Galli, D. Gasparrini, C. Labanti, I. Lapshov, Francesco Lazzarotto, F. Liello, P. Lipari, E. Mattaini, M. Marisaldi, M. Mastropietro, A. Mauri, F. Mauri, S. Mereghetti, E. Morelli, E. Moretti, A. Morselli, L. Pacciani, F. Perotti, G. Piano, P. Picozza, M. Pilia, C. Pontoni, G. Porrovecchio, B. Preger, M. Prest, R. Primavera, G. Pucella, M. Rapisarda, A. Rappoldi, E. Rossi, A. Rubini, S. Sabatini, P. Santolamazza, E. Scalise, P. Soffitta, S. Stellato, E. Striani, F. Tamburelli, A. Traci, A. Trois, E. Vallazza, V. Vittorini, A. Zambra, D. Zanello, L. Salotti   +82 more
semanticscholar   +1 more source

Impact of Hot Isostatic Pressing on Microstructure Evolution and Creep Performance of Powder Bed Fusion–Laser Beam Processed CM247LC

Advanced Engineering Materials, EarlyView.
The influence of Hot Isostatic Pressing (HIP) temperature on the microstructure and creep performance of powder bed fusion–laser beam processed CM247LC superalloy is investigated. Grain growth and γ’ precipitate evolution are characterized following HIP at varying temperatures.
Ahmed Fardan, Johannes Gårdstam, Eva Oscarsson, Håkan Brodin, Eduard Hryha   +4 more
wiley   +1 more source

TeV Analysis of a Source-rich Region with the HAWC Observatory: Is HESS J1809-193 a Potential Hadronic PeVatron?

The Astrophysical Journal
HESS J1809-193 is an unidentified TeV source, first detected by the High Energy Stereoscopic System (H.E.S.S.) collaboration. The emission originates in a source-rich region that includes several supernova remnants (SNRs) and pulsars including SNR G11.1 ...
A. Albert, R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, R. Babu, E. Belmont-Moreno, A. Bernal, M. Breuhaus, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, J. Cotzomi, E. De la Fuente, D. Depaoli, N. Di Lalla, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, C. Espinoza, K. L. Fan, K. Fang, B. Fick, N. Fraija, J. A. García-González, F. Garfias, A. Gonzalez Muñoz, M. M. González, J. A. Goodman, S. Groetsch, J. P. Harding, S. Hernández-Cadena, I. Herzog, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, V. Joshi, S. Kaufmann, A. Lara, J. Lee, H. León Vargas, A. L. Longinotti, G. Luis-Raya, K. Malone, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Montes, J. A. Morales-Soto, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, M. Osorio, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, A. Sandoval, M. Schneider, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, E. Varela, X. Wang, I. J. Watson, E. Willox, S. Yun-Cárcamo, H. Zhou, THE HAWC COLLABORATION   +82 more
doaj   +1 more source

On the Gamma-Ray Emission of the Andromeda Galaxy M31

The Astrophysical Journal Letters, 2023
Using the γ -ray data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (Fermi) for ∼14 yr, we examine the high-energy emission emanating from the center of the Andromeda galaxy M31.
Yi Xing, Zhongxiang Wang, Dong Zheng, Jie Li   +3 more
doaj   +1 more source

The gamma-ray observatory [PDF]

, 1991
An overview is given of the Gamma Ray Observatory (GRO) mission. Detection of gamma rays and gamma ray sources, operations using the Space Shuttle, and instruments aboard the GRO, including the Burst and Transient Source Experiment (BATSE), the Oriented ...

core   +1 more source

gamma-ray DBSCAN: a clustering algorithm applied to Fermi-LAT gamma-ray data. I. Detection performances with real and simulated data

, 2012
The Density Based Spatial Clustering of Applications with Noise (DBSCAN) is a topometric algorithm used to cluster spatial data that are affected by background noise.
Tramacere, A., Vecchio, C.
core   +1 more source