Results 71 to 80 of about 20,006 (198)

Pulsars identified in the LOFAR Two-metre Sky Survey at 144 MHz

Astronomy & Astrophysics
We present the astrometric identification of 80 known radio pulsars as unresolved continuum sources detected at 144 MHz in the second data release of the LOFAR Two-metre Sky Survey (LoTSS DR2), which covers 27% of the northern hemisphere.
Rijkers G. A. C., Bassa C. G., Callingham J. R., Shimwell T.   +3 more
doaj   +1 more source

Utrecht and Galactic Radio Astronomy [PDF]

, 2013
Important roles in early Dutch Galactic radio astronomy were played by several Utrecht astronomers: Van de Hulst, Minnaert and Houtgast. The poster announcing the conference contained a number of pictures referring to scientific achievements of the ...
van Woerden, H.
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The radio environment for a space-based low-frequency radio astronomy instrument [PDF]

, 2019
Opening the last frequency window for radio astronomy in the sub - 30 MHz region includes a few challenges. First of all, at frequencies below 30 MHz the Earths ionosphere severely distorts radio waves originating from celestial sources, and it ...
Albert Jan Boonstra, Vugt, Pieter van, Wouter Horlings, van Vugt, Pieter, Horlings, Wouter, Pieter van Vugt, Bentum, Mark J., Bentum, MJ, Boonstra, Albert Jan, Mark J. Bentum   +9 more
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Multiwavelength insights into the pulsar wind nebula candidate near 1LHAASO J0343+5254u: An obscured merging galaxy cluster?

Astronomy & Astrophysics
Context. The advent of the Large High Altitude Air Shower Observatory (LHAASO) accelerated the detection of tera- and petaelectronvolt gamma-ray sources.
Edler H. W., Arias M., Botteon A., Bassa C. G.   +3 more
doaj   +1 more source

Highlighting the history of French Radio Astronomy. 6: the multi-element grating arrays at Nançay [PDF]

, 2011
After constructing a number of simple antennas for solar work at Nançay field station, during the second half of the 1950s and through into the 1960s radio astronomers from the Paris Observatory (Meudon) erected five different innovative multi-element ...
Orchiston, Wayne, Pick, Monique, Steinberg, Jean-Louis, Boischot, André   +3 more
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Spatial modifications of three-dimensional elliptic Gaussian beam scattered by two-dimensional periodic array.

Advanced Electromagnetics, 2012
The diffraction problem of a three-dimensional elliptic p- polarized Gaussian beam on an aperture array of rectangular holes is solved. The new algorithm for the solution of three-dimensional scattering problems of linearly polarized wave beams on two ...
A. Gribovsky, O. Yeliseyev
doaj   +1 more source

Site selection for a radio astronomy observatory in Turkey: atmospherical, meteorological, and radio frequency analyses [PDF]

, 2012
---Selecting the future site for a large Turkish radio telescope is a key issue. The National Radio Astronomy Observatory is now in the stage of construction at a site near Karaman City, in Turkey.
ONAY, Sedat, ÖZEREN, Ferhat Fikri, Dagtekin, Nazli Derya, ÖZDEMİR, Ali Riza, ÖZ, Sukriye, Sarikaya, Mikail, GÜLŞEN, Mehmet, KÜÇÜK, Ibrahim, Uler, Ipek   +8 more
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Highlighting the History of French Radio Astronomy. 4. Early Solar Research at the École Normale Supérieure, Marcoussis and Nancay [PDF]

, 2009
The first tentative steps in solar radio astronomy took place during the 1940s and early 1950s as physicists and engineers in a number of countries used recycled World War II equipment to investigate the flux levels and polarisation of solar bursts and ...
Boischot, Andre, Kundu, Mukul, Blum, Emile-Jacques, Orchiston, Wayne, Steinberg, Jean-Louis, Arsac, Jacques   +5 more
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Applications of the Irbene Single-Baseline Radio Interferometer

Galaxies
The Irbene single-baseline radio interferometer (ISBI), operated by the Ventspils International Radio Astronomy Centre (VIRAC), offers a rare and versatile configuration in modern radio astronomy.
Ivar Shmeld, Vladislavs Bezrukovs, Jānis Šteinbergs, Karina Šķirmante, Artis Aberfelds, Sergey A. Belov, Ross A. Burns, Dmitrii Y. Kolotkov, Valery M. Nakariakov, Dmitrijs Bezrukovs, Matīss Purviņš, Aija Kalniņa, Arturs Orbidans, Marcis Bleiders, Marina Konuhova   +14 more
doaj   +1 more source

Putting the pieces together: the systematic development of a software defined radio toolflow for the Rhino project [PDF]

, 2011
This dissertation is concerned with the thesis that it is possible for a software defined radio system that has been described in accordance with synchronous data flow theory to be implemented upon a reconfigurable computing ...
Inggs, Gordon Eric
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