Search Results - "BRIGGS, Frank H"
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Neutral atomic hydrogen (H i) gas evolution in field galaxies at z ∼ 0.1 and ∼ 0.2
Published in Monthly notices of the Royal Astronomical Society (01-11-2013)“…We measure the neutral atomic hydrogen (H i) gas content of field galaxies at intermediate redshifts of z ∼ 0.1 and ∼0.2 using hydrogen 21-cm emission lines…”
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Giant Metrewave Radio Telescope observations of neutral atomic hydrogen gas in the COSMOS field at z ∼ 0.37
Published in Monthly notices of the Royal Astronomical Society (11-08-2016)“…We present the results of H i spectral stacking analysis of Giant Metrewave Radio Telescope (GMRT) observations targeting the Cosmological Evolution Survey…”
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Cosmology at low frequencies: The 21 cm transition and the high-redshift Universe
Published in Physics reports (01-10-2006)“…Observations of the high-redshift Universe with the 21 cm hyperfine line of neutral hydrogen promise to open an entirely new window onto the early phases of…”
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Overcoming real-world obstacles in 21 cm power spectrum estimation: A method demonstration and results from early Murchison Widefield Array data
Published in Physical review. D, Particles, fields, gravitation, and cosmology (15-01-2014)“…We present techniques for bridging the gap between idealized inverse covariance weighted quadratic estimation of 21 cm power spectra and the real-world…”
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The H i gas content of galaxies around Abell 370, a galaxy cluster at z= 0.37
Published in Monthly notices of the Royal Astronomical Society (01-11-2009)“…We used observations from the Giant Metrewave Radio Telescope to measure the atomic hydrogen gas content of 324 galaxies around the galaxy cluster Abell 370 at…”
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A Metallicity-Spin Temperature Relation in Damped Lyα Systems
Published in The Astrophysical journal (01-11-2009)Get full text
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The H i content of star-forming galaxies at z= 0.24
Published in Monthly notices of the Royal Astronomical Society (11-04-2007)“…We use observations from the Giant Metrewave Radio Telescope (GMRT) to measure the atomic hydrogen gas content of star-forming galaxies at z= 0.24 (i.e. a…”
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A GPU-based Real-time Software Correlation System for the Murchison Widefield Array Prototype
Published in Publications of the Astronomical Society of the Pacific (01-08-2009)“…Modern graphics processing units (GPUs) are inexpensive commodity hardware that offer Tflop/s theoretical computing capacity. GPUs are well suited to many…”
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LOW-FREQUENCY IMAGING OF FIELDS AT HIGH GALACTIC LATITUDE WITH THE MURCHISON WIDEFIELD ARRAY 32 ELEMENT PROTOTYPE
Published in The Astrophysical journal (10-08-2012)“…The Murchison Widefield Array (MWA) is a new low-frequency, wide-field-of-view radio interferometer under development at the Murchison Radio-astronomy…”
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A digital-receiver for the MurchisonWidefield Array
Published in Experimental astronomy (01-03-2015)“…An FPGA-based digital-receiver has been developed for a low-frequency imaging radio interferometer, the Murchison Widefield Array (MWA). The MWA, located at…”
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The H I Mass Function of Galaxies from a Deep Survey in the 21 Centimeter Line
Published in The Astrophysical journal (20-11-1997)Get full text
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Detection of Crab Giant Pulses Using the Mileura Widefield Array Low Frequency Demonstrator Field Prototype System
Published in The Astrophysical journal (10-08-2007)“…We report on the detection of giant pulses from the Crab Nebula pulsar at a frequency of 200 MHz using the field deployment system designed for the Mileura…”
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The Space Density of Primordial Gas Clouds near Galaxies and Groups and their Relation to Galactic High-Velocity Clouds
Published in The Astrophysical journal (20-02-2000)“…The Arecibo H i Strip Survey probed the halos of approximately 300 cataloged galaxies and the environments of approximately 14 groups with sensitivity to…”
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Neutral hydrogen (H i) gas content of galaxies at z ≈ 0.32
Published in Monthly notices of the Royal Astronomical Society (11-01-2018)“…Abstract We use observations made with the Giant Metrewave Radio Telescope (GMRT) to probe the neutral hydrogen (H i) gas content of field galaxies in the…”
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Base Band Data for Testing Interference Mitigation Algorithms
Published in Publications of the Astronomical Society of Australia (2001)“…Digital signal processing is one of many valuable tools for suppressing unwanted signals or inter-ference. Building hardware processing engines seems to be the…”
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Cosmology at low frequencies: The 21cm transition and the high-redshift Universe
Published in Physics reports (01-10-2006)Get full text
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The Murchison Widefield Array: Design Overview
Published in Proceedings of the IEEE (01-08-2009)“…The Murchison Widefield Array is a dipole-based aperture array synthesis telescope designed to operate in the 80-300 MHz frequency range. It is capable of a…”
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A METALLICITY-SPIN TEMPERATURE RELATION IN DAMPED Lyalpha SYSTEMS
Published in The Astrophysical journal (01-11-2009)“…We report evidence for an anti-correlation between spin temperature T{sub s} and metallicity [Z/H], detected at 3.6sigma significance in a sample of 26 damped…”
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The H i gas content of galaxies around Abell 370, a galaxy cluster at z= 0.37
Published in Monthly notices of the Royal Astronomical Society (01-11-2009)Get full text
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