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Title:
The High Time and Frequency Resolution Capabilities of the Murchison Widefield Array
Authors:
Tremblay, S. E.; Ord, S. M.; Bhat, N. D. R.; Tingay, S. J.; Crosse, B.; Pallot, D.; Oronsaye, S. I.; Bernardi, G.; Bowman, J. D.; Briggs, F.; Cappallo, R. J.; Corey, B. E.; Deshpande, A. A.; Emrich, D.; Goeke, R.; Greenhill, L. J.; Hazelton, B. J.; Johnston-Hollitt, M.; Kaplan, D. L.; Kasper, J. C.; Kratzenberg, E.; Lonsdale, C. J.; Lynch, M. J.; McWhirter, S. R.; Mitchell, D. A.; Morales, M. F.; Morgan, E.; Oberoi, D.; Prabu, T.; Rogers, A. E. E.; Roshi, A.; Udaya Shankar, N.; Srivani, K. S.; Subrahmanyan, R.; Waterson, M.; Wayth, R. B.; Webster, R. L.; Whitney, A. R.; Williams, A.; Williams, C. L.
Affiliation:
AA(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AB(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AC(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AD(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AE(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia), AF(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia), AG(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AH(SKA SA, 3rd Floor, The Park, Park Road, Pinelands, 7405, South Africa; Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA), AI(School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA), AJ(Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia), AK(MIT Haystack Observatory, Westford, MA 01886, USA), AL(MIT Haystack Observatory, Westford, MA 01886, USA), AM(Raman Research Institute, Bangalore 560080, Karnataka, India), AN(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia), AO(Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA), AP(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA), AQ(Department of Physics, University of Washington, Seattle, WA 98195, USA), AR(School of Chemical & Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand), AS(Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA), AT(Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, USA; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA), AU(MIT Haystack Observatory, Westford, MA 01886, USA), AV(MIT Haystack Observatory, Westford, MA 01886, USA), AW(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia), AX(MIT Haystack Observatory, Westford, MA 01886, USA), AY(CSIRO Astronomy and Space Science (CASS), PO Box 76, Epping, NSW 1710, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), AZ(Department of Physics, University of Washington, Seattle, WA 98195, USA), BA(Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA), BB(National Centre for Radio Astrophysics, Tata Institute for Fundamental Research, Pune 411007, Maharashtra, India), BC(Raman Research Institute, Bangalore 560080, Karnataka, India), BD(MIT Haystack Observatory, Westford, MA 01886, USA), BE(National Radio Astronomy Observatory, Charlottesville and Greenbank, VA, USA), BF(Raman Research Institute, Bangalore 560080, Karnataka, India), BG(Raman Research Institute, Bangalore 560080, Karnataka, India), BH(Raman Research Institute, Bangalore 560080, Karnataka, India; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), BI(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia; SKA Organization, Jodrell Bank Observatory, Lower Withington, Macclesfield, SK11 9DL, United Kingdom), BJ(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), BK(School of Physics, The University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), Redfern, NSW 2016, Australia), BL(MIT Haystack Observatory, Westford, MA 01886, USA), BM(International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102, Australia), BN(Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA)
Publication:
Publications of the Astronomical Society of Australia, Volume 32, id.e005 9 pp. (PASA Homepage)
Publication Date:
02/2015
Origin:
CUP
Astronomy Keywords:
instrumentation: interferometers, pulsars: general, radio continuum: general, Sun: radio radiation, techniques: radar astronomy
Abstract Copyright:
2015: Astronomical Society of Australia
DOI:
10.1017/pasa.2015.6
Bibliographic Code:
2015PASA...32....5T

Abstract

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 extragalactic bursts of radio emission, the so-called fast radio bursts (FRBs). Originally conceived purely as an imaging telescope, the initial design of the Murchison Widefield Array (MWA) did not include the ability to access high time and frequency resolution voltage data. However, the flexibility of the MWA's software correlator allowed an off-the-shelf solution for adding this capability. This paper describes the system that records the 100 mus and 10 kHz resolution voltage data from the MWA. Example science applications, where this capability is critical, are presented, as well as accompanying commissioning results from this mode to demonstrate verification.
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