Results 41 to 50 of about 19,422 (206)

Source detection using a 3D sparse representation: application to the Fermi gamma-ray space telescope [PDF]

Astronomy & Astrophysics, 2009
The multiscale variance stabilization Transform (MSVST) has recently been proposed for Poisson data denoising. This procedure, which is nonparametric, is based on thresholding wavelet coefficients. We present in this paper an extension of the MSVST to 3D data (in fact 2D-1D data) when the third dimension is not a spatial dimension, but the wavelength ...
Jean‐Luc Starck, Jalal Fadili, S. W. Digel, B. Zhang, J. Chiang   +4 more
openalex   +6 more sources

Twelve Years of Education and Public Outreach with the Fermi Gamma-ray Space Telescope

, 2013
2012 Fermi Symposium proceedings - eConf ...
Lynn Cominsky, K. M. McLin, A. Simonnet, Fermi Education   +3 more
openalex   +4 more sources

First High‐Speed Video Camera Observations of a Lightning Flash Associated With a Downward Terrestrial Gamma‐Ray Flash

Geophysical Research Letters, Volume 50, Issue 14, 28 July 2023., 2023
Abstract In this paper, we present the first high‐speed video observation of a cloud‐to‐ground lightning flash and its associated downward‐directed Terrestrial Gamma‐ray Flash (TGF). The optical emission of the event was observed by a high‐speed video camera running at 40,000 frames per second in conjunction with the Telescope Array Surface Detector ...
R. U. Abbasi, M. M. F. Saba, J. W. Belz, P. R. Krehbiel, W. Rison, N. Kieu, D. R. da Silva, M. A. Stanley, Dan Rodeheffer, J. Remington, J. Mazich, R. LeVon, K. Smout, A. Petrizze, T. Abu‐Zayyad, M. Allen, R. Arimura, E. Barcikowski, D. R. Bergman, S. A. Blake, I. Buckland, B. G. Cheon, M. Chikawa, T. Fujii, K. Fujisue, K. Fujita, R. Fujiwara, M. Fukushima, G. Furlich, N. Globus, R. Gonzalez, W. Hanlon, N. Hayashida, H. He, K. Hibino, R. Higuchi, K. Honda, D. Ikeda, N. Inoue, T. Ishii, H. Ito, D. Ivanov, H. Iwakura, A. Iwasaki, H. M. Jeong, S. Jeong, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, K. Kasahara, S. Kasami, S. Kawakami, K. Kawata, I. Kharuk, E. Kido, H. B. Kim, J. H. Kim, J. H. Kim, S. W. Kim, Y. Kimura, I. Komae, Y. Kubota, M. Kuznetsov, Y. J. Kwon, K. H. Lee, B. Lubsandorzhiev, J. P. Lundquist, T. Matsuyama, J. N. Matthews, R. Mayta, I. Myers, S. Nagataki, K. Nakai, R. Nakamura, T. Nakamura, A. Nakazawa, E. Nishio, T. Nonaka, S. Ogio, M. Ohnishi, H. Ohoka, Y. Oku, T. Okuda, Y. Omura, M. Ono, A. Oshima, S. Ozawa, I. H. Park, M. Potts, M. S. Pshirkov, D. C. Rodriguez, C. Rott, G. I. Rubtsov, D. Ryu, H. Sagawa, N. Sakaki, T. Sako, N. Sakurai, K. Sato, T. Seki, K. Sekino, P. D. Shah, Y. Shibasaki, N. Shibata, T. Shibata, J. Shikita, H. Shimodaira, B. K. Shin, H. S. Shin, D. Shinto, J. D. Smith, P. Sokolsky, B. T. Stokes, T. A. Stroman, K. Takahashi, M. Takamura, M. Takeda, R. Takeishi, A. Taketa, M. Takita, Y. Tameda, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, R. Tsuda, Y. Tsunesada, S. Udo, T. Uehama, F. Urban, D. Warren, T. Wong, M. Yamamoto, K. Yamazaki, K. Yashiro, F. Yoshida, Y. Zhezher, Z. Zundel   +143 more
wiley   +1 more source

Multiwavelength astrophysics of the blazar OJ 287 and the project MOMO

Astronomische Nachrichten, Volume 344, Issue 4, May 2023., 2023
Abstract We are carrying out the densest and longest multiyear, multiwavelength monitoring project of OJ 287 ever done. The project MOMO (Multiwavelength Observations and Modeling of OJ 287) covers wavelengths from the radio to the high‐energy regime. A few selected observations are simultaneous with those of the Event Horizon Telescope (EHT).
S. Komossa, A. Kraus, D. Grupe, M.L. Parker, A. Gonzalez, L.C. Gallo, M.A. Gurwell, S. Laine, S. Yao, S. Chandra, L. Dey, J.L. Gómez, K. Hada, D. Haggard, A.R. Hollett, H. Jermak, S. Jorstad, T.P. Krichbaum, S. Markoff, C. McCall, J. Neilsen, M. Nowak   +21 more
wiley   +1 more source

GeV Analysis of Mixed Morphology Supernova Remnants Interacting with Molecular Clouds [PDF]

, 2012
The first remnants detected by the Fermi Gamma-ray Space Telescope were of the type of mixed-morphology supernova remnants interacting with molecular clouds.
Ercan, E. Nihal, Ergin, Tülün
core   +2 more sources

Cosmic-Ray accelerators in Milky Way studied with the Fermi Gamma-ray Space Telescope

Journal of Physics: Conference Series, 2011
High-energy gamma-ray astrophysics is now situated at a confluence of particle physics, plasma physics and traditional astrophysics. Fermi Gamma-ray Space Telescope (FGST) and upgraded Imaging Atmospheric Cherenkov Telescopes (IACTs) have been invigorating this interdisciplinary area of research.
T. Kamae
openalex   +3 more sources

Fermi: Monitoring the Gamma-Ray Universe

Galaxies, 2018
Since 2008, the Large Area Telescope and the Gamma-ray Burst Monitor on the Fermi Gamma-ray Space Telescope have been monitoring the entire sky at energies from about 8 keV to more than 1 TeV.
David J. Thompson
doaj   +1 more source

A likelihood‐based particle imaging filter using prior information

Medical Physics, Volume 50, Issue 4, Page 2336-2353, April 2023., 2023
Abstract Background Particle imaging can increase precision in proton and ion therapy. Interactions with nuclei in the imaged object increase image noise and reduce image quality, especially for multinucleon ions that can fragment, such as helium. Purpose This work proposes a particle imaging filter, referred to as the Prior Filter, based on using ...
Ryan Fullarton, Lennart Volz, Nikolaos Dikaios, Reinhard Schulte, Gary Royle, Philip M. Evans, Joao Seco, Charles‐Antoine Collins‐Fekete   +7 more
wiley   +1 more source

The Fermi Large Area gamma ray Telescope and the current searches for dark matter in space [PDF]

Journal of Physics: Conference Series, 2011
Since its launch in the 2008, the Large Area Telescope, onboard of the Fermi Gamma-ray Space Telescope, has detected the largest amount of gamma rays, in the 20MeV 300GeV energy range and electrons + positrons in the 7 GeV- 1 TeV range. This impressive statistics allows one to perform a very sensitive indirect experimental search for dark matter.
A. Morselli
openalex   +4 more sources

Latest Results from the Fermi Gamma-Ray Telescope

Acta Polytechnica CTU Proceedings, 2014
Can we learn about New Physics with astronomical and astro-particle data? Since its launch in 2008, the Large Area Telescope, onboard of the Fermi Gamma-ray Space Telescope, has detected the largest amount of gamma rays in the 20 MeV - 300 GeV energy ...
Aldo Morselli
doaj   +1 more source