Results 21 to 30 of about 137,822 (286)

The Most Sensitive SETI Observations Toward Barnard's Star with FAST

open access: yesThe Astronomical Journal, 2023
Search for extraterrestrial intelligence (SETI) has been mainly focused on nearby stars and their planets in recent years. Barnard’s star is the second closest star system to the Sun and the closest star in the Five-hundred-meter Aperture Spherical radio
Zhen-Zhao Tao   +6 more
doaj   +1 more source

Radio Observations of the Black Hole Candidate GX 339-4 [PDF]

open access: yes, 1997
The black hole candidate GX 339-4 was first detected as a variable radio source by Sood & Campbell-Wilson in May 1994 with the Molonglo Observatory Synthesis Telescope (MOST).
Campbell-Wilson, D.   +6 more
core   +3 more sources

First scientific VLBI observations using New Zealand 30 metre radio telescope WARK30M [PDF]

open access: yes, 2015
We report the results of a successful 24 hour 6.7 GHz VLBI experiment using the 30 meter radio telescope WARK30M near Warkworth, New Zealand, recently converted from a radio telecommunications antenna, and two radio telescopes located in Australia ...
Ellingsen, Simon   +5 more
core   +2 more sources

Scheduling and calibration strategy for continuous radio monitoring of 1700 sources every three days [PDF]

open access: yes, 2014
The Owens Valley Radio Observatory 40 meter telescope is currently monitoring a sample of about 1700 blazars every three days at 15 GHz, with the main scientific goal of determining the relation between the variability of blazars at radio and gamma-rays ...
Max-Moerbeck, Walter
core   +2 more sources

STUDIES OF PULSAR RADIO EMISSION WITH THE GURT RADIO TELESCOPE SUBARRAY [PDF]

open access: yesRadio Physics and Radio Astronomy, 2018
Purpose: Finding the possibility of pulsar radio emission studies in the meter wavelength range with a small-sized subarray of the low-frequency GURT radio telescope of new generation. Development of the joint pulsar radio emission observations technique
V. V. Zakharenko   +6 more
doaj   +1 more source

MULTIPLE CORRELATION MODELS OF DEPENDENCE OF RADIANT FLUXES OF COSMIC RADIO SOURCES ON EXTREME CONDITIONS OF SPACE WEATHER AT DECAMETER WAVES [PDF]

open access: yesRadio Physics and Radio Astronomy, 2018
Purpose: Investigation of the effects of the influence of solar and geomagnetic activity on the condition of the Earth’s upper atmosphere by the method of “transmission through” it with the radiation of cosmic radio sources.
L. I. Sobitniak
doaj   +1 more source

Effect of Parasitic Element on 408 MHz Antenna for Radio Astronomy Application

open access: yesInternational Journal of Antennas and Propagation, 2014
Antenna is one of the important subsystem components in a radio telescope system. In this paper, analysis on the effect of parasitic element on 408 MHz antenna in a radio telescope system is presented.
Radial Anwar   +5 more
doaj   +1 more source

A Construction of the Real Time Monitoring System of the Solar Radio Disturbance [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2004
As the first step of the real time monitoring system of the solar radio disturbance, we constructed the control system of the solar radio telescope.
Joh-Na Yoon   +3 more
doaj   +1 more source

The latest on Apertif [PDF]

open access: yes, 2010
We describe a Phased Array Feed (PAF) system, called Apertif, which will be installed in the Westerbork Synthesis Radio Telescope (WSRT). The aim of Apertif is, at frequencies from 1.0 to 1.7 GHz, to increase the instantaneous field of view of the WSRT 8
Oosterloo, Tom   +2 more
core   +3 more sources

A Construction of the Real Time Monitoring System of the Solar Radio Disturbance: II. 2.8GHz Radio Receiver and Radio Environment [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2008
As the second step of the real time monitoring system of the solar radio disturbance, we constructed a 2.8 GHz radio receiver with 500 MHz bandwith.
Yonggi Kim   +3 more
doaj   +1 more source

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