Results 21 to 30 of about 669,031 (383)

Temperature effect of muons registered under the ground in Yakutsk by telescopes on GAS-discharge counters

Solar-Terrestrial Physics, 2023
The Yakutsk spectrograph of cosmic rays includes a complex of muon telescopes based on gas-discharge and scintillation counters located on the surface and under the ground at depths of 7, 20, and 40 m.w.e.
Yanchukovsky V. L.
doaj   +1 more source

Energy Spectra of Atmospheric Turbulence for Calculating $C_n^2$ Parameter. I. Maidanak and Suffa Observatories in Uzbekistan

Atmosphere, 2021
Knowledge of the turbulence spectra is of interest for describing atmospheric conditions as applied to astronomical observations. This article discusses the deformations of the turbulence spectra with heights in a wide range of scales at the sites of the
Artem Yu. Shikhovtsev, Pavel G. Kovadlo, Evgeniy A. Kopylov, Mansur A. Ibrahimov, Shuhrat A. Ehgamberdiev, Yusufjon A. Tillayev   +5 more
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James Webb Space Telescope

Resonance, 2022
The James Webb Space Telescope, or JWST, or simply Webb, is a large, space-based observatory, designed primarily to conduct infrared astronomy. The telescope is named after James Edwin Webb (1906–1992), who was the second administrator of NASA during ...
A. Sharma
semanticscholar   +1 more source

The First Telescope in the Korean History I. Translation of Jeong`s Report [PDF]

Journal of Astronomy and Space Sciences, 2009
In 1631 A.D. Jeong Duwon, an ambassador of the Joseon dynasty was sent to the Ming dynasty. There he met João Rodrigues, a Jesuit missionary, in Dengzhou of Shandong peninsula.
Sang-Hyeon Ahn
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Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

Solar-Terrestrial Physics, 2022
The paper presents the results of studies of wavefront distortions at different heights in the atmosphere. We have used measurement wavefront data to determine optical turbulence parameters along the line of sight of the Large Solar Vacuum Telescope ...
Shikhovtsev A. Y., Kiselev A. V., Kovadlo P. G., Kolobov D. Y., Russkikh I. V., Tomin V. E   +5 more
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First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole [PDF]

, 2019
When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon.
The Event Horizon Telescope Collaboration
semanticscholar   +1 more source

In-flight performance and calibration of the Infrared Array Camera (IRAC) for the Spitzer Space Telescope [PDF]

SPIE Astronomical Telescopes + Instrumentation, 2004
The Infrared Array Camera (IRAC) is one of three focal plane instruments on board the Spitzer Space Telescope. IRAC is a four-channel camera that obtains simultaneous broad-band images at 3.6, 4.5, 5.8, and 8.0 μm in two nearly adjacent fields of view ...
G. Fazio, J. Hora, L. E. Allen, M. Ashby, P. Barmby, L. Deutsch, J.-S. Huang, S. Kleiner, M. Marengo, S. Megeath, G. Melnick, M. Pahre, B. Patten, J. Polizotti, H. Smith, R. Taylor, Z. Wang, S. Willner, W. Hoffmann, J. Pipher, W. Forrest, C. W. McMurty, C. Mccreight, M. Mckelvey, R. Mcmurray, D. Koch, S. Moseley, R. Arendt, J. Mentzell, C. Marx, P. Losch, P. Mayman, W. Eichhorn, D. Krebs, M. Jhabvala, D. Gezari, D. Fixsen, J. Flores, K. Shakoorzadeh, R. Jungo, C. Hakun, L. Workman, G. Karpati, R. Kichak, R. Whitley, S. Mann, E. Tollestrup, P. Eisenhardt, D. Stern, V. Gorjian, B. Bhattacharya, S. Carey, B. Nelson, W. Glaccum, M. Lacy, P. Lowrance, S. Laine, W. Reach, J. A. Stauffer, J. Surace, G. Wilson, E. L. Wright, A. Hoffman, G. Domingo, M. Cohen   +64 more
semanticscholar   +1 more source

The Atacama Cosmology Telescope: DR4 maps and cosmological parameters [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013–2016 at 98 and 150 GHz. The maps cover more than 17,000 deg2, the deepest
S. Aiola, E. Calabrese, L. Maurin, S. Naess, B. Schmitt, M. Abitbol, G. Addison, P. Ade, D. Alonso, M. Amiri, S. Amodeo, Elio Angile, J. Austermann, T. Baildon, N. Battaglia, J. Beall, R. Bean, D. Becker, J. Bond, S. M. Bruno, V. Calafut, L. Campusano, Felipe Carrero, G. Chesmore, Hsiao-mei Cho., Steve K. Choi, S. Clark, N. Cothard, D. Crichton, K. Crowley, O. Darwish, R. Datta, E. Denison, M. Devlin, C. Duell, S. Duff, A. Duivenvoorden, J. Dunkley, R. Dunner, T. Essinger-Hileman, M. Fankhanel, S. Ferraro, A. Fox, Brittany Fuzia, P. Gallardo, V. Gluscevic, J. Golec, E. Grace, M. Gralla, Y. Guan, K. Hall, M. Halpern, Dongwon Han, P. Hargrave, M. Hasselfield, J. Helton, S. Henderson, B. Hensley, J. Hill, G. Hilton, M. Hilton, A. Hincks, R. Hlovzek, S. Ho, J. Hubmayr, K. Huffenberger, J. Hughes, L. Infante, K. Irwin, Rebecca Jackson, J. Klein, K. Knowles, B. Koopman, A. Kosowsky, Vincent Lakey, Dale Li, Yaqiong Li, Zack Li, M. Lokken, T. Louis, M. Lungu, A. Macinnis, M. Madhavacheril, F. Maldonado, M. Mallaby-Kay, D. Marsden, J. McMahon, F. Menanteau, K. Moodley, Tim Morton, T. Namikawa, F. Nati, L. Newburgh, J. Nibarger, A. Nicola, M. Niemack, M. Nolta, John Orlowski-Sherer, L. Page, C. Pappas, B. Partridge, P. Phakathi, H. Prince, R. Puddu, F. Qu, J. Rivera, N. Robertson, F. Rojas, M. Salatino, E. Schaan, A. Schillaci, N. Sehgal, B. Sherwin, C. Sierra, J. Sievers, C. Sifón, P. Sikhosana, S. Simon, D. Spergel, S. Staggs, J. Stevens, E. Storer, D. Sunder, E. Switzer, B. Thorne, R. Thornton, H. Trac, J. Treu, C. Tucker, L. Vale, A. V. Engelen, J. Lanen, E. Vavagiakis, K. Wagoner, Yuhan Wang, J. Ward, Edward J. Wollack, Zhilei Xu, Fernando Zago, N. Zhu   +139 more
semanticscholar   +1 more source

Estimation of Astronomical Seeing with Neural Networks at the Maidanak Observatory

Atmosphere, 2023
In the present article, we study the possibilities of machine learning for the estimation of seeing at the Maidanak Astronomical Observatory (38∘40′24″ N, 66∘53′47″ E) using only Era-5 reanalysis data.
Artem Y. Shikhovtsev, Alexander V. Kiselev, Pavel G. Kovadlo, Evgeniy A. Kopylov, Kirill E. Kirichenko, Shuhrat A. Ehgamberdiev, Yusufjon A. Tillayev   +6 more
doaj   +1 more source

Optical Design of a Novel Wide-Field-of-View Space-Based Spectrometer for Climate Monitoring

Sensors, 2022
We report on a near-infrared imaging spectrometer for sensing the three most prominent greenhouse gases in the atmosphere (water vapor, carbon dioxide and methane).
Luca Schifano, Francis Berghmans, Steven Dewitte, Lien Smeesters   +3 more
doaj   +1 more source