First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype

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

doi:10.1088/2041-8205/728/2/L27

First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype

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. BriggsJohn 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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our observing period is characterized as a period of "low" to "medium" activity, one broadband emission feature and numerous short-lived, narrowband, non-thermal emission features are evident. Our data represent a significant advance in low radio frequency solar imaging, enabling us to follow the spatial, spectral, and temporal evolution of events simultaneously and in unprecedented detail. The rich variety of features seen here reaffirms the coronal diagnostic capability of low radio frequency emission and provides an early glimpse of the nature of radio observations that will become available as the next generation of low-frequency radio interferometers come online over the next few years.

Original language	English
Journal	Astrophysical Journal Letters
Volume	728
Issue number	2 PART II
DOIs	https://doi.org/10.1088/2041-8205/728/2/L27
Publication status	Published - 20 Feb 2011

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Oberoi, D., Matthews, L. D., Cairns, I. H., Emrich, D., Lobzin, V., Lonsdale, C. J., Morgan, E. H., Prabu, T., Vedantham, H., Wayth, R. B., Williams, A., Williams, C., White, S. M., Allen, G., Arcus, W., Barnes, D., Benkevitch, L., Bernardi, G., Bowman, J. D., ... Whitney, A. R. (2011). First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype. Astrophysical Journal Letters, 728(2 PART II). https://doi.org/10.1088/2041-8205/728/2/L27

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title = "First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype",

abstract = "We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our observing period is characterized as a period of {"}low{"} to {"}medium{"} activity, one broadband emission feature and numerous short-lived, narrowband, non-thermal emission features are evident. Our data represent a significant advance in low radio frequency solar imaging, enabling us to follow the spatial, spectral, and temporal evolution of events simultaneously and in unprecedented detail. The rich variety of features seen here reaffirms the coronal diagnostic capability of low radio frequency emission and provides an early glimpse of the nature of radio observations that will become available as the next generation of low-frequency radio interferometers come online over the next few years.",

keywords = "Instrumentation: interferometers, Radiation mechanisms: non-thermal, Sun: corona, Sun: radio radiation",

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

year = "2011",

month = feb,

day = "20",

doi = "10.1088/2041-8205/728/2/L27",

language = "English",

volume = "728",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2 PART II",

}

Oberoi, D, Matthews, LD, Cairns, IH, Emrich, D, Lobzin, V, Lonsdale, CJ, Morgan, EH, Prabu, T, Vedantham, H, Wayth, RB, Williams, A, Williams, C, White, SM, Allen, G, Arcus, W, Barnes, D, Benkevitch, L, Bernardi, G, Bowman, JD, Briggs, FH, Bunton, JD, Burns, S, Cappallo, RC, Clark, MA, Corey, BE, Dawson, M, Deboer, D, De Gans, A, Desouza, L, Derome, M, Edgar, RG, Elton, T, Goeke, R, Gopalakrishna, MR, Greenhill, LJ, Hazelton, B, Herne, D, Hewitt, JN, Kamini, PA, Kaplan, DL, Kasper, JC, Kennedy, R, Kincaid, BB, Kocz, J, Koeing, R, Kowald, E, Lynch, MJ, Madhavi, S, McWhirter, SR, Mitchell, DA, Morales, MF, Ng, A, Ord, SM, Pathikulangara, J, Rogers, AEE, Roshi, A, Salah, JE, Sault, RJ, Schinckel, A, Udaya Shankar, N, Srivani, KS, Stevens, J, Subrahmanyan, R, Thakkar, D, Tingay, SJ, Tuthill, J, Vaccarella, A, Waterson, M, Webster, RL & Whitney, AR 2011, 'First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype', Astrophysical Journal Letters, vol. 728, no. 2 PART II. https://doi.org/10.1088/2041-8205/728/2/L27

TY - JOUR

T1 - First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype

AU - Oberoi, Divya

AU - Matthews, Lynn D.

AU - Cairns, Iver H.

AU - Emrich, David

AU - Lobzin, Vasili

AU - Lonsdale, Colin J.

AU - Morgan, Edward H.

AU - Prabu, T.

AU - Vedantham, Harish

AU - Wayth, Randall B.

AU - Williams, Andrew

AU - Williams, Christopher

AU - White, Stephen M.

AU - Allen, G.

AU - Arcus, Wayne

AU - Barnes, David

AU - Benkevitch, Leonid

AU - Bernardi, Gianni

AU - Bowman, Judd D.

AU - Briggs, Frank H.

AU - Bunton, John D.

AU - Burns, Steve

AU - Cappallo, Roger C.

AU - Clark, M. A.

AU - Corey, Brian E.

AU - Dawson, M.

AU - Deboer, David

AU - De Gans, A.

AU - Desouza, Ludi

AU - Derome, Mark

AU - Edgar, R. G.

AU - Elton, T.

AU - Goeke, Robert

AU - Gopalakrishna, M. R.

AU - Greenhill, Lincoln J.

AU - Hazelton, Bryna

AU - Herne, David

AU - Hewitt, Jacqueline N.

AU - Kamini, P. A.

AU - Kaplan, David L.

AU - Kasper, Justin C.

AU - Kennedy, Rachel

AU - Kincaid, Barton B.

AU - Kocz, Jonathan

AU - Koeing, R.

AU - Kowald, Errol

AU - Lynch, Mervyn J.

AU - Madhavi, S.

AU - McWhirter, Stephen R.

AU - Mitchell, Daniel A.

AU - Morales, Miguel F.

AU - Ng, A.

AU - Ord, Stephen M.

AU - Pathikulangara, Joseph

AU - Rogers, Alan E.E.

AU - Roshi, Anish

AU - Salah, Joseph E.

AU - Sault, Robert J.

AU - Schinckel, Antony

AU - Udaya Shankar, N.

AU - Srivani, K. S.

AU - Stevens, Jamie

AU - Subrahmanyan, Ravi

AU - Thakkar, D.

AU - Tingay, Steven J.

AU - Tuthill, J.

AU - Vaccarella, Annino

AU - Waterson, Mark

AU - Webster, Rachel L.

AU - Whitney, Alan R.

PY - 2011/2/20

Y1 - 2011/2/20

N2 - We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our observing period is characterized as a period of "low" to "medium" activity, one broadband emission feature and numerous short-lived, narrowband, non-thermal emission features are evident. Our data represent a significant advance in low radio frequency solar imaging, enabling us to follow the spatial, spectral, and temporal evolution of events simultaneously and in unprecedented detail. The rich variety of features seen here reaffirms the coronal diagnostic capability of low radio frequency emission and provides an early glimpse of the nature of radio observations that will become available as the next generation of low-frequency radio interferometers come online over the next few years.

AB - We present the first spectroscopic images of solar radio transients from the prototype for the Murchison Widefield Array, observed on 2010 March 27. Our observations span the instantaneous frequency band 170.9-201.6 MHz. Though our observing period is characterized as a period of "low" to "medium" activity, one broadband emission feature and numerous short-lived, narrowband, non-thermal emission features are evident. Our data represent a significant advance in low radio frequency solar imaging, enabling us to follow the spatial, spectral, and temporal evolution of events simultaneously and in unprecedented detail. The rich variety of features seen here reaffirms the coronal diagnostic capability of low radio frequency emission and provides an early glimpse of the nature of radio observations that will become available as the next generation of low-frequency radio interferometers come online over the next few years.

KW - Instrumentation: interferometers

KW - Radiation mechanisms: non-thermal

KW - Sun: corona

KW - Sun: radio radiation

UR - http://www.scopus.com/inward/record.url?scp=79960205376&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/728/2/L27

DO - 10.1088/2041-8205/728/2/L27

M3 - Article

SN - 2041-8205

VL - 728

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2 PART II

ER -

First spectroscopic imaging observations of the sun at low radio frequencies with the Murchison Widefield Array prototype

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