Related papers: Solar Imaging using Low Frequency Arrays

First Spectroscopic Imaging Observations of the Sun at Low Radio Frequencies with the Murchison Widefield Array Prototype

We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array (MWA), observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our…

Solar and Stellar Astrophysics · Physics 2015-05-20 Divya Oberoi , Lynn D. Matthews , Iver H. Cairns , David Emrich , Vasili Lobzin , Colin J. Lonsdale , Edward H. Morgan , T. Prabu , Harish Vedantham , Randall B. Wayth , Andrew Williams , Christopher Williams , Stephen M. White , G. Allen , Wayne Arcus , David Barnes , Leonid Benkevitch , Gianni Bernardi , Judd D. Bowman , Frank H. Briggs , John D. Bunton , Steve Burns , Roger C. Cappallo , M. A. Clark , Brian E. Corey , M. Dawson , David DeBoer , A. De Gans , Ludi deSouza , Mark Derome , R. G. Edgar , T. Elton , Robert Goeke , M. R. Gopalakrishna , Lincoln J. Greenhill , Bryna Hazelton , David Herne , Jacqueline N. Hewitt , P. A. Kamini , David L. Kaplan , Justin C. Kasper , Rachel Kennedy , Barton B. Kincaid , Jonathan Kocz , R. Koeing , Errol Kowald , Mervyn J. Lynch , S. Madhavi , Stephen R. McWhirter , Daniel A. Mitchell , Miguel F. Morales , A. Ng , Stephen M. Ord , Joseph Pathikulangara , Alan E. E. Rogers , Anish Roshi , Joseph E. Salah , Robert J. Sault , Antony Schinckel , N. Udaya Shankar , K. S. Srivani , Jamie Stevens , Ravi Subrahmanyan , D. Thakkar , Steven J. Tingay , J. Tuthill , Annino Vaccarella , Mark Waterson , Rachel L. Webster , Alan R. Whitney

Observing the Sun with the Murchison Widefield Array

The Sun has remained a difficult source to image for radio telescopes, especially at the low radio frequencies. Its morphologically complex emission features span a large range of angular scales, emission mechanisms involved and brightness…

Instrumentation and Methods for Astrophysics · Physics 2014-03-26 D. Oberoi , R. Sharma , S. Bhatnagar , C. J. Lonsdale , L. D. Matthews , I. H. Cairns , S. J. Tingay , L. Benkevitch , A. Donea , S. M. White , G. Bernardi , J. D. Bowman , F. Briggs , R. J. Cappallo , B. E. Corey , A. Deshpande , D. Emrich , B. M. Gaensler , R. Goeke , L. J. Greenhill , B. J. Hazelton , M. Johnston-Hollitt , D. L. Kaplan , J. C. Kasper , E. Kratzenberg , M. J. Lynch , S. R. McWhirter , D. A. Mitchell , M. F. Morales , E. Morgan , A. R. Offringa , S. M. Ord , T. Prabu , A. E. E. Rogers , A. Roshi , J. E. Salah , N. Udaya Shankar , K. S. Srivani , R. Subrahmanyan , M. Waterson , R. B. Wayth , R. L. Webster , A. R. Whitney , A. William , C. L. Williams

Working Principle of the Calibration Algorithm for High Dynamic Range Solar Imaging with Square Kilometre Array Precursor

Imaging the low-frequency radio Sun is an intrinsically challenging problem. Meter-wavelength solar emission spans angular scales from a few arcminutes to a few degrees. These emissions show temporal and spectral variability on a sub-second…

Solar and Stellar Astrophysics · Physics 2022-09-22 Devojyoti Kansabanik

Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities

The Murchison Widefield Array (MWA) is an open access telescope dedicated to studying the low frequency (80$-$300 MHz) southern sky. Since beginning operations in mid 2013, the MWA has opened a new observational window in the southern…

Instrumentation and Methods for Astrophysics · Physics 2020-01-08 A. P. Beardsley , M. Johnston-Hollitt , C. M. Trott , J. C. Pober , J. Morgan , D. Oberoi , D. L. Kaplan , C. R. Lynch , G. E. Anderson , P. I. McCauley , S. Croft , C. W. James , O. I. Wong , C. D. Tremblay , R. P. Norris , I. H. Cairns , C. J. Lonsdale , P. J. Hancock , B. M. Gaensler , N. D. R. Bhat , W. Li , N. Hurley-Walker , J. R. Callingham , N. Seymour , S. Yoshiura , R. C. Joseph , K. Takahashi , M. Sokolowski , J. C. A. Miller-Jones , J. V. Chauhan , I. Bojičić , M. D. Filipović , D. Leahy , H. Su , W. W. Tian , S. J. McSweeney , B. W. Meyers , S. Kitaeff , T. Vernstrom , G. Gürkan , G. Heald , M. Xue , C. J. Riseley , S. W. Duchesne , J. D. Bowman , D. C. Jacobs , B. Crosse , D. Emrich , T. M. O. Franzen , L. Horsley , D. Kenney , M. F. Morales , D. Pallot , K. Steele , S. J. Tingay , M. Walker , R. B. Wayth , A. Williams , C. Wu

Low Frequency Imaging of Fields at High Galactic Latitude with the Murchison Widefield Array 32-Element Prototype

The Murchison Widefield Array (MWA) is a new low-frequency, wide field-of-view radio interferometer under development at the Murchison Radio-astronomy Observatory (MRO) in Western Australia. We have used a 32-element MWA prototype…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Christopher L. Williams , Jacqueline N. Hewitt , Alan M. Levine , Angelica de Oliveira-Costa , Judd D. Bowman , Frank H. Briggs , B. M. Gaensler , Lars L. Hernquist , Daniel A. Mitchell , Miguel F. Morales , Shiv K. Sethi , Ravi Subrahmanyan , Elaine M. Sadler , Wayne Arcus , David G. Barnes , Gianni Bernardi , John D. Bunton , Roger C. Cappallo , Brian W. Crosse , Brian E. Corey , Avinash Deshpande , Ludi deSouza , David Emrich , Robert F. Goeke , Lincoln J. Greenhill , Bryna J. Hazelton , David Herne , David L. Kaplan , Justin C. Kasper , Barton B. Kincaid , Ronald Koenig , Eric Kratzenberg , Colin J. Lonsdale , Mervyn J. Lynch , S. Russell McWhirter , %Daniel A. Mitchell , %Miguel F. Morales , Edward H. Morgan , Divya Oberoi , Stephen M. Ord , Joseph Pathikulangara , Thiagaraj Prabu , Ronald A. Remillard , Alan E. E. Rogers , Anish A. Roshi , Joseph E. Salah , Robert J. Sault , N. Udaya Shankar , K. S. Srivani , Jamie B. Stevens , Steven J. Tingay , Randall B. Wayth , Mark Waterson , Rachel L. Webster , Alan R. Whitney , Andrew J. Williams , J. Stuart B. Wyithe

The challenges of low-frequency radio polarimetry: lessons from the Murchison Widefield Array

We present techniques developed to calibrate and correct Murchison Widefield Array (MWA) low frequency (72-300 MHz) radio observations for polarimetry. The extremely wide field-of-view, excellent instantaneous (u, v)-coverage and…

Instrumentation and Methods for Astrophysics · Physics 2017-10-04 Emil Lenc , C. S. Anderson , N. Barry , J. D. Bowman , I. H. Cairns , J. S. Farnes , B. M. Gaensler , G. Heald , M. Johnston-Hollitt , D. L. Kaplan , C. R. Lynch , P. I. McCauley , D. A. Mitchell , J. Morgan , M. F. Morales , T. Murphy , A. R. Offringa , S. M. Ord , B. Pindor , C. Riseley , E. M. Sadler , C. Sobey , M. Sokolowski , I. S. Sullivan , S. P. O'Sullivan , X. H. Sun , S. E. Tremblay , C. M. Trott , R. B. Wayth

On the detection and tracking of space debris using the Murchison Widefield Array. I. Simulations and test observations demonstrate feasibility

The Murchison Widefield Array (MWA) is a new low frequency interferomeric radio telescope. The MWA is the low frequency precursor to the Square Kilometre Array (SKA) and is the first of three SKA precursors to be operational, supporting a…

Instrumentation and Methods for Astrophysics · Physics 2015-06-16 S. J. Tingay , D. L. Kaplan , B. McKinley , F. Briggs , R. B. Wayth , N. Hurley-Walker , J. Kennewell , C. Smith , K. Zhang , W. Arcus , R. Bhat , D. Emrich , D. Herne , N. Kudryavtseva , M. Lynch , S. M. Ord , M. Waterson , D. G. Barnes , M. Bell , B. M. Gaensler , E. Lenc , G. Bernardi , L. J. Greenhill , J. C. Kasper , J. D. Bowman , D. Jacobs , J. D. Bunton , L. deSouza , R. Koenig , J. Pathikulangara , J. Stevens , R. J. Cappallo , B. E. Corey , B. B. Kincaid , E. Kratzenberg , C. J. Lonsdale , S. R. McWhirter , A. E. E. Rogers , J. E. Salah , A. R. Whitney , A. Deshpande , T. Prabu , N. Udaya Shankar , K. S. Srivani , R. Subrahmanyan , A. Ewall-Wice , L. Feng , R. Goeke , E. Morgan , R. A. Remillard , C. L. Williams , B. J. Hazelton , M. F. Morales , M. Johnston-Hollitt , D. A. Mitchell , P. Procopio , J. Riding , R. L. Webster , J. S. B. Wyithe , D. Oberoi , A. Roshi , R. J. Sault , A. Williams

Interferometric imaging with the 32 element Murchison Wide-field Array

The Murchison Wide-field Array (MWA) is a low frequency radio telescope, currently under construction, intended to search for the spectral signature of the epoch of re-ionisation (EOR) and to probe the structure of the solar corona. Sited…

Instrumentation and Methods for Astrophysics · Physics 2015-05-20 S. M. Ord , D. A. Mitchell , R. B. Wayth , L. J. Greenhill , G. Bernardi , S. Gleadow , R. G. Edgar , M. A. Clark , G. Allen , W. Arcus , L. Benkevitch , J. D. Bowman , F. H. Briggs , J. D. Bunton , S. Burns , R. J. Cappallo , W. A. Coles , B. E. Corey , L. deSouza , S. S. Doeleman , M. Derome , A. Deshpande , D. Emrich , R. Goeke , M. R. Gopalakrishna , D. Herne , J. N. Hewitt , P. A. Kamini , D. L. Kaplan , J. C. Kasper , B. B. Kincaid , J. Kocz , E. Kowald , E. Kratzenberg , D. Kumar , C. J. Lonsdale , M. J. Lynch , S. R. McWhirter , S. Madhavi , M. Matejek , M. F. Morales , E. Morgan , D. Oberoi , J. Pathikulangara , T. Prabu , A. E. E. Rogers , A. Roshi , J. E. Salah , A. Schinkel , N. Udaya Shankar , K. S. Srivani , J. Stevens , S. J. Tingay , A. Vaccarella , M. Waterson , R. L. Webster , A. R. Whitney , A. Williams , C. Williams

The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation

The Murchison Widefield Array (MWA) is a new low-frequency interferometric radio telescope built in Western Australia at one of the locations of the future Square Kilometre Array (SKA). We describe the automated radio-frequency interference…

Instrumentation and Methods for Astrophysics · Physics 2015-03-12 A. R. Offringa , R. B. Wayth , N. Hurley-Walker , D. L. Kaplan , N. Barry , A. P. Beardsley , M. E. Bell , G. Bernardi , J. D. Bowman , F. Briggs , J. R. Callingham , R. J. Cappallo , P. Carroll , A. A. Deshpande , J. S. Dillon , K. S. Dwarakanath , A. Ewall-Wice , L. Feng , B. -Q. For , B. M. Gaensler , L. J. Greenhill , P. Hancock , B. J. Hazelton , J. N. Hewitt , L. Hindson , D. C. Jacobs , M. Johnston-Hollitt , A. D. Kapińska , H. -S. Kim , P. Kittiwisit , E. Lenc , J. Line , A. Loeb , C. J. Lonsdale , B. McKinley , S. R. McWhirter , D. A. Mitchell , M. F. Morales , E. Morgan , J. Morgan , A. R. Neben , D. Oberoi , S. M. Ord , S. Paul , B. Pindor , J. C. Pober , T. Prabu , P. Procopio , J. Riding , N. Udaya Shankar , S. Sethi , K. S. Srivani , L. Staveley-Smith , R. Subrahmanyan , I. S. Sullivan , M. Tegmark , N. Thyagarajan , S. J. Tingay , C. M. Trott , R. L. Webster , A. Williams , C. L. Williams , C. Wu , J. S. Wyithe , Q. Zheng

The High Time and Frequency Resolution Capabilities of the Murchison Widefield Array

The science cases for incorporating high time resolution capabilities into modern radio telescopes are as numerous as they are compelling. Science targets range from exotic sources such as pulsars, to our Sun, to recently detected possible…

Instrumentation and Methods for Astrophysics · Physics 2015-06-23 S. E. Tremblay , S. M. Ord , N. D. R. Bhat , S. J. Tingay , B. Crosse , D. Pallot , S. I. Oronsaye , G. Bernardi , J. D. Bowman , F. Briggs , R. J. Cappallo , B. E. Corey , A. A. Deshpande , D. Emrich , R. Goeke , L. J. Greenhill , B. J. Hazelton , M. Johnston-Hollitt , D. L. Kaplan , J. C. Kasper , E. Kratzenberg , C. J. Lonsdale , M. J. Lynch , S. R. McWhirter , D. A. Mitchell , M. F. Morales , E. Morgan , D. Oberoi , T. Prabu , A. E. E. Rogers , A. Roshi , N. Udaya Shankar , K. S. Srivani , R. Subrahmanyan , M. Waterson , R. B. Wayth , R. L. Webster , A. R. Whitney , A. Williams , C. L. Williams

MWA Tied-Array Processing IV: A Multi-Pixel Beamformer for Pulsar Surveys and Ionospheric Corrected Localisation

The Murchison Widefield Array (MWA) is a low-frequency aperture array capable of high-time and frequency resolution astronomy applications such as pulsar studies. The large field-of-view of the MWA (hundreds of square degrees) can also be…

Instrumentation and Methods for Astrophysics · Physics 2022-05-18 N. A. Swainston , N. D. R. Bhat , I. S. Morrison , S. J. McSweeney , S. M. Ord , S. E. Tremblay , M. Sokolowski

The Murchison Widefield Array: solar science with the low frequency SKA Precursor

The Murchison Widefield Array is a low frequency (80 - 300 MHz) SKA Precursor, comprising 128 aperture array elements (known as tiles) distributed over an area of 3 km diameter. The MWA is located at the extraordinarily radio quiet…

Instrumentation and Methods for Astrophysics · Physics 2015-06-12 S. J. Tingay , D. Oberoi , I. Cairns , A. Donea , R. Duffin , W. Arcus , G. Bernardi , J. D. Bowman , F. Briggs , J. D. Bunton , R. J. Cappallo , B. E. Corey , A. Deshpande , L. deSouza , D. Emrich , B. M. Gaensler , R. Goeke , L. J. Greenhill , B. J. Hazelton , D. Herne , J. N. Hewitt , M. Johnston-Hollitt , D. L. Kaplan , J. C. Kasper , J. A. Kennewell , B. B. Kincaid , R. Koenig , E. Kratzenberg , C. J. Lonsdale , M. J. Lynch , S. R. McWhirter , D. A. Mitchell , M. F. Morales , E. Morgan , S. M. Ord , J. Pathikulangara , T. Prabu , R. A Remillard , A. E. E. Rogers , A. Roshi , J. E. Salah , R. J. Sault , N. Udaya-Shankar , K. S. Srivani , J. Stevens , R. Subrahmanyan , M. Waterson , R. B. Wayth , R. L. Webster , A. R. Whitney , A. Williams , C. L. Williams , J. S. B. Wyithe

An Ultra-High Time Resolution Cosmic Ray Detection Mode for the Murchison Widefield Array

The radio-wavelength detection of extensive air showers (EAS) initiated by cosmic-ray interactions in the Earth's atmosphere is a promising technique for investigating the origin of these particles and the physics of their interactions. The…

Instrumentation and Methods for Astrophysics · Physics 2021-03-29 A. Williamson , C. W. James , S. J. Tingay , S. J. McSweeney , S. M. Ord

Unsupervised generation of high dynamic range solar images: A novel algorithm for self-calibration of interferometry data

Solar radio emission, especially at metre-wavelengths, is well known to vary over small spectral ($\lesssim$100\,kHz) and temporal ($<1$\,s) spans. It is comparatively recently, with the advent of a new generation of instruments, that it…

Instrumentation and Methods for Astrophysics · Physics 2019-05-01 Surajit Mondal , Atul Mohan , Divya Oberoi , John S. Morgan , Leonid Benkevitch , Colin J. Lonsdale , Meagan Crowley , Iver H. Cairns

The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies

The Murchison Widefield Array (MWA) is one of three Square Kilometre Array Precursor telescopes and is located at the Murchison Radio-astronomy Observatory in the Murchison Shire of the mid-west of Western Australia, a location chosen for…

Instrumentation and Methods for Astrophysics · Physics 2015-06-05 S. J. Tingay , R. Goeke , J. D. Bowman , D. Emrich , S. M. Ord , D. A. Mitchell , M. F. Morales , T. Booler , B. Crosse , D. Pallot , A. Wicenec , W. Arcus , D. Barnes , G. Bernardi , F. Briggs , S. Burns , J. D. Bunton , R. J. Cappallo , T. Colegate , B. E. Corey , A. Deshpande , L. deSouza , B. M. Gaensler , L. J. Greenhill , J. Hall , B. J. Hazelton , D. Herne , J. N. Hewitt , M. Johnston-Hollitt , D. L. Kaplan , J. C. Kasper , B. B. Kincaid , R. Koenig , E. Kratzenberg , C. J. Lonsdale , M. J. Lynch , B. McKinley , S. R. McWhirter , E. Morgan , D. Oberoi , J. Pathikulangara , T. Prabu , R. A. Remillard , A. E. E. Rogers , A. Roshi , J. E. Salah , R. J. Sault , N. Udaya-Shankar , F. Schlagenhaufer , K. S. Srivani , J. Stevens , R. Subrahmanyan , S. Tremblay , R. B. Wayth , M. Waterson , R. L. Webster , A. R. Whitney , A. Williams , C. L. Williams , J. S. B. Wyithe

A very brief description of LOFAR - the Low Frequency Array

LOFAR (Low Frequency Array) is an innovative radio telescope optimized for the frequency range 30-240 MHz. The telescope is realized as a phased aperture array without any moving parts. Digital beam forming allows the telescope to point to…

Astrophysics · Physics 2009-11-11 H. Falcke , M. P. van Haarlem , A. G. de Bruyn , R. Braun , H. J. A. Röttgering , B. Stappers , W. H. W. M. Boland , H. R. Butcher , E. J. de Geus , L. Koopmans , R. Fender , J. Kuijpers , G. K. Miley , R. T. Schilizzi , C. Vogt , R. A. M. J. Wijers , M. Wise , W. N. Brouw , J. P. Hamaker , J. E. Noordam , T. Oosterloo , L. Bähren , M. A. Brentjens , S. J. Wijnholds , J. D. Bregman , W. A. van Cappellen , A. W. Gunst , G. W. Kant , J. Reitsma , K. van der Schaaf , C. M. de Vos

Realisation of a low frequency SKA Precursor: The Murchison Widefield Array

The Murchison Widefield Array is a low frequency (80 - 300 MHz) SKA Precursor, comprising 128 aperture array elements distributed over an area of 3 km diameter. The MWA is located at the extraordinarily radio quiet Murchison Radioastronomy…

Instrumentation and Methods for Astrophysics · Physics 2012-12-07 S. J. Tingay , R. Goeke , J. N. Hewitt , E. Morgan , R. A Remillard , C. L. Williams , J. D. Bowman , D. Emrich , S. M. Ord , T. Booler , B. Crosse , D. Pallot , W. Arcus , T. Colegate , P. J. Hall , D. Herne , M. J. Lynch , F. Schlagenhaufer , S. Tremblay , R. B. Wayth , M. Waterson , D. A. Mitchell , R. J. Sault , R. L. Webster , J. S. B. Wyithe , M. F. Morales , B. J. Hazelton , A. Wicenec , A. Williams , D. Barnes , G. Bernardi , L. J. Greenhill , J. C. Kasper , F. Briggs , B. McKinley , J. D. Bunton , L. deSouza , R. Koenig , J. Pathikulangara , J. Stevens , R. J. Cappallo , B. E. Corey , B. B. Kincaid , E. Kratzenberg , C. J. Lonsdale , S. R. McWhirter , A. E. E. Rogers , J. E. Salah , A. R. Whitney , A. Deshpande , T. Prabu , A. Roshi , N. Udaya-Shankar , K. S. Srivani , R. Subrahmanyan , B. M. Gaensler , M. Johnston-Hollitt , D. L. Kaplan , D. Oberoi

LOFAR: Recent imaging results & future prospects

The Low Frequency Array (LOFAR) is under construction in the Netherlands and in several surrounding European countries. In this contribution, we describe the layout and design of the telescope, with a particular emphasis on the imaging…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-13 George Heald , Michael R. Bell , Andreas Horneffer , André R. Offringa , Roberto Pizzo , Sebastiaan van der Tol , Reinout J. van Weeren , Joris E. van Zwieten , James M. Anderson , Rainer Beck , Ilse van Bemmel , Laura Bîrzan , Annalisa Bonafede , John Conway , Chiara Ferrari , Francesco De Gasperin , Marijke Haverkorn , Neal Jackson , Giulia Macario , John McKean , Halime Miraghaei , Emanuela Orrù , David Rafferty , Huub Röttgering , Anna Scaife , Aleksandar Shulevski , Carlos Sotomayor , Cyril Tasse , Monica Trasatti , Olaf Wucknitz

The Radio Sky on Short Timescales with LOFAR: Pulsars and Fast Transients

LOFAR, the "low-frequency array", will be one of the first in a new generation of radio telescopes and Square Kilometer Array (SKA) pathfinders that are highly flexible in capability because they are largely software driven. LOFAR will not…

Instrumentation and Methods for Astrophysics · Physics 2009-03-10 J. W. T. Hessels , B. W. Stappers , J. van Leeuwen , LOFAR Transients Key Science Project

The Murchison Widefield Array Enters Adolescence: A Personal Review of the Early Years of Operations

The Murchison Widefield Array (MWA) is a low frequency radio interferometer designed and developed by an international consortium, operated on behalf of the consortium by Curtin University. The MWA is a Precursor for the low frequency…

Instrumentation and Methods for Astrophysics · Physics 2025-09-11 Steven J. Tingay