Observing the Sun with the Murchison Widefield Array

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, Judd Bowman, F. Briggs, R. J. Cappallo, B. E. Corey, A. Deshpande, D. Emrich, B. M. Gaensler, R. Goeke, L. J. GreenhillB. 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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 and the emission mechanisms involved, span a wide range in brightness temperatures. In addition, time and frequency synthesis, the key tool used by most radio interferometers to build up information about the source being imaged is not effective for solar imaging, because many of the features of interest are short lived and change dramatically over small fractional bandwidths. Building on the advances in radio frequency technology, digital signal processing and computing, the kind of instruments needed to simultaneously capture the evolution of solar emission in time, frequency, morphology and polarization over a large spectral span with the requisite imaging fidelity, and time and frequency resolution have only recently begun to appear. Of this class of instruments, the Murchison Widefield Array (MWA) is best suited for solar observations. The MWA has now entered a routine observing phase and here we present some early examples from MWA observations.

Original languageEnglish (US)
Title of host publication2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781467352253
DOIs
StatePublished - Oct 17 2014
Event31st General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2014 - Beijing, China
Duration: Aug 16 2014Aug 23 2014

Other

Other31st General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2014
CountryChina
CityBeijing
Period8/16/148/23/14

Fingerprint

Sun
Radio telescopes
Imaging techniques
Digital signal processing
Interferometers
Luminance
Polarization
Bandwidth
Temperature

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Oberoi, D., Sharma, R., Bhatnagar, S., Lonsdale, C. J., Matthews, L. D., Cairns, I. H., ... Williams, C. L. (2014). Observing the Sun with the Murchison Widefield Array. In 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014 [6930045] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/URSIGASS.2014.6930045

Observing the Sun with the Murchison Widefield Array. / Oberoi, D.; Sharma, R.; Bhatnagar, S.; Lonsdale, C. J.; Matthews, L. D.; Cairns, I. H.; Tingay, S. J.; Benkevitch, L.; Donea, A.; White, S. M.; Bernardi, G.; Bowman, Judd; Briggs, F.; Cappallo, R. J.; Corey, B. E.; Deshpande, A.; Emrich, D.; Gaensler, B. M.; Goeke, R.; Greenhill, L. J.; Hazelton, B. J.; Johnston-Hollitt, M.; Kaplan, D. L.; Kasper, J. C.; Kratzenberg, E.; Lynch, M. J.; McWhirter, S. R.; Mitchell, D. A.; Morales, M. F.; Morgan, E.; Offringa, A. R.; Ord, S. M.; Prabu, T.; Rogers, A. E E; Roshi, A.; Salah, J. E.; Shankar, N. Udaya; Srivani, K. S.; Subrahmanyan, R.; Waterson, M.; Wayth, R. B.; Webster, R. L.; Whitney, A. R.; William, A.; Williams, C. L.

2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. 6930045.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Oberoi, D, Sharma, R, Bhatnagar, S, Lonsdale, CJ, Matthews, LD, Cairns, IH, Tingay, SJ, Benkevitch, L, Donea, A, White, SM, Bernardi, G, Bowman, J, Briggs, F, Cappallo, RJ, Corey, BE, Deshpande, A, Emrich, D, Gaensler, BM, Goeke, R, Greenhill, LJ, Hazelton, BJ, Johnston-Hollitt, M, Kaplan, DL, Kasper, JC, Kratzenberg, E, Lynch, MJ, McWhirter, SR, Mitchell, DA, Morales, MF, Morgan, E, Offringa, AR, Ord, SM, Prabu, T, Rogers, AEE, Roshi, A, Salah, JE, Shankar, NU, Srivani, KS, Subrahmanyan, R, Waterson, M, Wayth, RB, Webster, RL, Whitney, AR, William, A & Williams, CL 2014, Observing the Sun with the Murchison Widefield Array. in 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014., 6930045, Institute of Electrical and Electronics Engineers Inc., 31st General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2014, Beijing, China, 8/16/14. https://doi.org/10.1109/URSIGASS.2014.6930045
Oberoi D, Sharma R, Bhatnagar S, Lonsdale CJ, Matthews LD, Cairns IH et al. Observing the Sun with the Murchison Widefield Array. In 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014. Institute of Electrical and Electronics Engineers Inc. 2014. 6930045 https://doi.org/10.1109/URSIGASS.2014.6930045
Oberoi, D. ; Sharma, R. ; Bhatnagar, S. ; Lonsdale, C. J. ; Matthews, L. D. ; Cairns, I. H. ; Tingay, S. J. ; Benkevitch, L. ; Donea, A. ; White, S. M. ; Bernardi, G. ; Bowman, Judd ; Briggs, F. ; Cappallo, R. J. ; Corey, B. E. ; Deshpande, A. ; Emrich, D. ; Gaensler, B. M. ; Goeke, R. ; Greenhill, L. J. ; Hazelton, B. J. ; Johnston-Hollitt, M. ; Kaplan, D. L. ; Kasper, J. C. ; Kratzenberg, E. ; Lynch, M. J. ; McWhirter, S. R. ; Mitchell, D. A. ; Morales, M. F. ; Morgan, E. ; Offringa, A. R. ; Ord, S. M. ; Prabu, T. ; Rogers, A. E E ; Roshi, A. ; Salah, J. E. ; Shankar, N. Udaya ; Srivani, K. S. ; Subrahmanyan, R. ; Waterson, M. ; Wayth, R. B. ; Webster, R. L. ; Whitney, A. R. ; William, A. ; Williams, C. L. / Observing the Sun with the Murchison Widefield Array. 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014. Institute of Electrical and Electronics Engineers Inc., 2014.
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abstract = "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 and the emission mechanisms involved, span a wide range in brightness temperatures. In addition, time and frequency synthesis, the key tool used by most radio interferometers to build up information about the source being imaged is not effective for solar imaging, because many of the features of interest are short lived and change dramatically over small fractional bandwidths. Building on the advances in radio frequency technology, digital signal processing and computing, the kind of instruments needed to simultaneously capture the evolution of solar emission in time, frequency, morphology and polarization over a large spectral span with the requisite imaging fidelity, and time and frequency resolution have only recently begun to appear. Of this class of instruments, the Murchison Widefield Array (MWA) is best suited for solar observations. The MWA has now entered a routine observing phase and here we present some early examples from MWA observations.",
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T1 - Observing the Sun with the Murchison Widefield Array

AU - Oberoi, D.

AU - Sharma, R.

AU - Bhatnagar, S.

AU - Lonsdale, C. J.

AU - Matthews, L. D.

AU - Cairns, I. H.

AU - Tingay, S. J.

AU - Benkevitch, L.

AU - Donea, A.

AU - White, S. M.

AU - Bernardi, G.

AU - Bowman, Judd

AU - Briggs, F.

AU - Cappallo, R. J.

AU - Corey, B. E.

AU - Deshpande, A.

AU - Emrich, D.

AU - Gaensler, B. M.

AU - Goeke, R.

AU - Greenhill, L. J.

AU - Hazelton, B. J.

AU - Johnston-Hollitt, M.

AU - Kaplan, D. L.

AU - Kasper, J. C.

AU - Kratzenberg, E.

AU - Lynch, M. J.

AU - McWhirter, S. R.

AU - Mitchell, D. A.

AU - Morales, M. F.

AU - Morgan, E.

AU - Offringa, A. R.

AU - Ord, S. M.

AU - Prabu, T.

AU - Rogers, A. E E

AU - Roshi, A.

AU - Salah, J. E.

AU - Shankar, N. Udaya

AU - Srivani, K. S.

AU - Subrahmanyan, R.

AU - Waterson, M.

AU - Wayth, R. B.

AU - Webster, R. L.

AU - Whitney, A. R.

AU - William, A.

AU - Williams, C. L.

PY - 2014/10/17

Y1 - 2014/10/17

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