Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer

S. Hoover; J. Nam; P. W. Gorham; E. Grashorn; P. Allison; S. W. Barwick; J. J. Beatty; K. Belov; D. Z. Besson; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. Duvernois; R. C. Field; D. Goldstein; A. G. Vieregg; C. Hast; M. H. Israel; A. Javaid; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. C. Mercurio; C. Miki; P. Miočinović; C. J. Naudet; J. Ng; R. J. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L. Ruckman; D. Saltzberg; D. Seckel; G. S. Varner; D. Walz; F. Wu

doi:10.1103/PhysRevLett.105.151101

Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer

S. Hoover, J. Nam, P. W. Gorham, E. Grashorn, P. Allison, S. W. Barwick, J. J. Beatty, K. Belov, D. Z. Besson, W. R. Binns, C. Chen, P. Chen, J. M. Clem, A. Connolly, P. F. Dowkontt, M. A. Duvernois, R. C. Field, D. Goldstein, A. G. Vieregg, C. HastM. H. Israel, A. Javaid, J. Kowalski, J. G. Learned, K. M. Liewer, J. T. Link, E. Lusczek, S. Matsuno, B. C. Mercurio, C. Miki, P. Miočinović, C. J. Naudet, J. Ng, R. J. Nichol, K. Palladino, K. Reil, A. Romero-Wolf, M. Rosen, L. Ruckman, D. Saltzberg, D. Seckel, G. S. Varner, D. Walz, F. Wu

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Abstract

We report the observation of 16 cosmic ray events with a mean energy of 1.5×1019eV via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present measurements in the 300-900 MHz range, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Their properties are inconsistent with current ground-based geosynchrotron models. The emission is 100% polarized in the plane perpendicular to the projected geomagnetic field. Fourteen events are seen to have a phase inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon. Based on a likelihood analysis, we estimate angular pointing precision of order 2° for the event arrival directions.

Original language	English (US)
Article number	151101
Journal	Physical review letters
Volume	105
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.105.151101
State	Published - Oct 5 2010

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10.1103/PhysRevLett.105.151101

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Hoover, S., Nam, J., Gorham, P. W., Grashorn, E., Allison, P., Barwick, S. W., Beatty, J. J., Belov, K., Besson, D. Z., Binns, W. R., Chen, C., Chen, P., Clem, J. M., Connolly, A., Dowkontt, P. F., Duvernois, M. A., Field, R. C., Goldstein, D., Vieregg, A. G., ... Wu, F. (2010). Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer. Physical review letters, 105(15), Article 151101. https://doi.org/10.1103/PhysRevLett.105.151101

Hoover, S, Nam, J, Gorham, PW, Grashorn, E, Allison, P, Barwick, SW, Beatty, JJ, Belov, K, Besson, DZ, Binns, WR, Chen, C, Chen, P, Clem, JM, Connolly, A, Dowkontt, PF, Duvernois, MA, Field, RC, Goldstein, D, Vieregg, AG, Hast, C, Israel, MH, Javaid, A, Kowalski, J, Learned, JG, Liewer, KM, Link, JT, Lusczek, E, Matsuno, S, Mercurio, BC, Miki, C, Miočinović, P, Naudet, CJ, Ng, J, Nichol, RJ, Palladino, K, Reil, K, Romero-Wolf, A, Rosen, M, Ruckman, L, Saltzberg, D, Seckel, D, Varner, GS, Walz, D & Wu, F 2010, 'Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer', Physical review letters, vol. 105, no. 15, 151101. https://doi.org/10.1103/PhysRevLett.105.151101

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title = "Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer",

abstract = "We report the observation of 16 cosmic ray events with a mean energy of 1.5×1019eV via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present measurements in the 300-900 MHz range, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Their properties are inconsistent with current ground-based geosynchrotron models. The emission is 100% polarized in the plane perpendicular to the projected geomagnetic field. Fourteen events are seen to have a phase inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon. Based on a likelihood analysis, we estimate angular pointing precision of order 2° for the event arrival directions.",

author = "S. Hoover and J. Nam and Gorham, {P. W.} and E. Grashorn and P. Allison and Barwick, {S. W.} and Beatty, {J. J.} and K. Belov and Besson, {D. Z.} and Binns, {W. R.} and C. Chen and P. Chen and Clem, {J. M.} and A. Connolly and Dowkontt, {P. F.} and Duvernois, {M. A.} and Field, {R. C.} and D. Goldstein and Vieregg, {A. G.} and C. Hast and Israel, {M. H.} and A. Javaid and J. Kowalski and Learned, {J. G.} and Liewer, {K. M.} and Link, {J. T.} and E. Lusczek and S. Matsuno and Mercurio, {B. C.} and C. Miki and P. Mio{\v c}inovi{\'c} and Naudet, {C. J.} and J. Ng and Nichol, {R. J.} and K. Palladino and K. Reil and A. Romero-Wolf and M. Rosen and L. Ruckman and D. Saltzberg and D. Seckel and Varner, {G. S.} and D. Walz and F. Wu",

year = "2010",

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doi = "10.1103/PhysRevLett.105.151101",

language = "English (US)",

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T1 - Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer

AU - Hoover, S.

AU - Nam, J.

AU - Gorham, P. W.

AU - Grashorn, E.

AU - Allison, P.

AU - Barwick, S. W.

AU - Beatty, J. J.

AU - Belov, K.

AU - Besson, D. Z.

AU - Binns, W. R.

AU - Chen, C.

AU - Chen, P.

AU - Clem, J. M.

AU - Connolly, A.

AU - Dowkontt, P. F.

AU - Duvernois, M. A.

AU - Field, R. C.

AU - Goldstein, D.

AU - Vieregg, A. G.

AU - Hast, C.

AU - Israel, M. H.

AU - Javaid, A.

AU - Kowalski, J.

AU - Learned, J. G.

AU - Liewer, K. M.

AU - Link, J. T.

AU - Lusczek, E.

AU - Matsuno, S.

AU - Mercurio, B. C.

AU - Miki, C.

AU - Miočinović, P.

AU - Naudet, C. J.

AU - Ng, J.

AU - Nichol, R. J.

AU - Palladino, K.

AU - Reil, K.

AU - Romero-Wolf, A.

AU - Rosen, M.

AU - Ruckman, L.

AU - Saltzberg, D.

AU - Seckel, D.

AU - Varner, G. S.

AU - Walz, D.

AU - Wu, F.

PY - 2010/10/5

Y1 - 2010/10/5

N2 - We report the observation of 16 cosmic ray events with a mean energy of 1.5×1019eV via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present measurements in the 300-900 MHz range, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Their properties are inconsistent with current ground-based geosynchrotron models. The emission is 100% polarized in the plane perpendicular to the projected geomagnetic field. Fourteen events are seen to have a phase inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon. Based on a likelihood analysis, we estimate angular pointing precision of order 2° for the event arrival directions.

AB - We report the observation of 16 cosmic ray events with a mean energy of 1.5×1019eV via radio pulses originating from the interaction of the cosmic ray air shower with the Antarctic geomagnetic field, a process known as geosynchrotron emission. We present measurements in the 300-900 MHz range, which are the first self-triggered, first ultrawide band, first far-field, and the highest energy sample of cosmic ray events collected with the radio technique. Their properties are inconsistent with current ground-based geosynchrotron models. The emission is 100% polarized in the plane perpendicular to the projected geomagnetic field. Fourteen events are seen to have a phase inversion due to reflection of the radio beam off the ice surface, and two additional events are seen directly from above the horizon. Based on a likelihood analysis, we estimate angular pointing precision of order 2° for the event arrival directions.

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DO - 10.1103/PhysRevLett.105.151101

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SN - 0031-9007

VL - 105

JO - Physical review letters

JF - Physical review letters

IS - 15

M1 - 151101

ER -

Observation of ultrahigh-energy cosmic rays with the ANITA balloon-borne radio interferometer

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