Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV

P. W. Gorham; A. Ludwig; C. Deaconu; P. Cao; P. Allison; O. Banerjee; L. Batten; D. Bhattacharya; J. J. Beatty; K. Belov; W. R. Binns; V. Bugaev; C. H. Chen; P. Chen; Y. Chen; J. M. Clem; L. Cremonesi; B. Dailey; P. F. Dowkontt; B. D. Fox; J. W.H. Gordon; C. Hast; B. Hill; S. Y. Hsu; J. J. Huang; K. Hughes; R. Hupe; M. H. Israel; T. C. Liu; L. Macchiarulo; S. Matsuno; K. McBride; C. Miki; J. Nam; C. J. Naudet; R. J. Nichol; A. Novikov; E. Oberla; M. Olmedo; R. Prechelt; B. F. Rauch; J. M. Roberts; A. Romero-Wolf; B. Rotter; J. W. Russell; D. Saltzberg; D. Seckel; H. Schoorlemmer; J. Shiao; S. Stafford; J. Stockham; M. Stockham; B. Strutt; M. S. Sutherland; G. S. Varner; A. G. Vieregg; S. H. Wang; S. A. Wissel

doi:10.1103/PhysRevLett.126.071103

Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV

P. W. Gorham
, A. Ludwig
, C. Deaconu
, P. Cao
, P. Allison
, O. Banerjee
, L. Batten
, D. Bhattacharya
, J. J. Beatty
, K. Belov
, W. R. Binns
, V. Bugaev
, C. H. Chen
, P. Chen
, Y. Chen
, J. M. Clem
, L. Cremonesi
, B. Dailey
, P. F. Dowkontt
, B. D. Fox

J. W.H. Gordon, C. Hast, B. Hill, S. Y. Hsu, J. J. Huang, K. Hughes, R. Hupe, M. H. Israel, T. C. Liu, L. Macchiarulo, S. Matsuno, K. McBride, C. Miki, J. Nam, C. J. Naudet, R. J. Nichol, A. Novikov, E. Oberla, M. Olmedo, R. Prechelt, B. F. Rauch, J. M. Roberts, A. Romero-Wolf, B. Rotter, J. W. Russell, D. Saltzberg, D. Seckel, H. Schoorlemmer, J. Shiao, S. Stafford, J. Stockham, M. Stockham, B. Strutt, M. S. Sutherland, G. S. Varner, A. G. Vieregg, S. H. Wang, S. A. Wissel

Physics

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

39 Scopus citations

Abstract

ANITA's fourth long-duration balloon flight in 2016 detected 29 cosmic-ray (CR)-like events on a background of 0.37-0.17+0.27 anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a phase-inverted waveform polarity. However, four of the below-horizon CR-like events show anomalous noninverted polarity, a p=5.3×10-4 chance if due to background. All anomalous events are from locations near the horizon; ANITA-IV observed no steeply upcoming anomalous events similar to the two such events seen in prior flights.

Original language	English (US)
Article number	071103
Journal	Physical review letters
Volume	126
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.126.071103
State	Published - Feb 19 2021

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.126.071103

Cite this

Gorham, P. W., Ludwig, A., Deaconu, C., Cao, P., Allison, P., Banerjee, O., Batten, L., Bhattacharya, D., Beatty, J. J., Belov, K., Binns, W. R., Bugaev, V., Chen, C. H., Chen, P., Chen, Y., Clem, J. M., Cremonesi, L., Dailey, B., Dowkontt, P. F., ... Wissel, S. A. (2021). Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV. Physical review letters, 126(7), Article 071103. https://doi.org/10.1103/PhysRevLett.126.071103

@article{8e3b3c344dc3414e847e87bfcdebe670,

title = "Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV",

abstract = "ANITA's fourth long-duration balloon flight in 2016 detected 29 cosmic-ray (CR)-like events on a background of 0.37-0.17+0.27 anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a phase-inverted waveform polarity. However, four of the below-horizon CR-like events show anomalous noninverted polarity, a p=5.3×10-4 chance if due to background. All anomalous events are from locations near the horizon; ANITA-IV observed no steeply upcoming anomalous events similar to the two such events seen in prior flights.",

author = "Gorham, \{P. W.\} and A. Ludwig and C. Deaconu and P. Cao and P. Allison and O. Banerjee and L. Batten and D. Bhattacharya and Beatty, \{J. J.\} and K. Belov and Binns, \{W. R.\} and V. Bugaev and Chen, \{C. H.\} and P. Chen and Y. Chen and Clem, \{J. M.\} and L. Cremonesi and B. Dailey and Dowkontt, \{P. F.\} and Fox, \{B. D.\} and Gordon, \{J. W.H.\} and C. Hast and B. Hill and Hsu, \{S. Y.\} and Huang, \{J. J.\} and K. Hughes and R. Hupe and Israel, \{M. H.\} and Liu, \{T. C.\} and L. Macchiarulo and S. Matsuno and K. McBride and C. Miki and J. Nam and Naudet, \{C. J.\} and Nichol, \{R. J.\} and A. Novikov and E. Oberla and M. Olmedo and R. Prechelt and Rauch, \{B. F.\} and Roberts, \{J. M.\} and A. Romero-Wolf and B. Rotter and Russell, \{J. W.\} and D. Saltzberg and D. Seckel and H. Schoorlemmer and J. Shiao and S. Stafford and J. Stockham and M. Stockham and B. Strutt and Sutherland, \{M. S.\} and Varner, \{G. S.\} and Vieregg, \{A. G.\} and Wang, \{S. H.\} and Wissel, \{S. A.\}",

note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society.",

year = "2021",

month = feb,

day = "19",

doi = "10.1103/PhysRevLett.126.071103",

language = "English (US)",

volume = "126",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "7",

}

Gorham, PW, Ludwig, A, Deaconu, C, Cao, P, Allison, P, Banerjee, O, Batten, L, Bhattacharya, D, Beatty, JJ, Belov, K, Binns, WR, Bugaev, V, Chen, CH, Chen, P, Chen, Y, Clem, JM, Cremonesi, L, Dailey, B, Dowkontt, PF, Fox, BD, Gordon, JWH, Hast, C, Hill, B, Hsu, SY, Huang, JJ, Hughes, K, Hupe, R, Israel, MH, Liu, TC, Macchiarulo, L, Matsuno, S, McBride, K, Miki, C, Nam, J, Naudet, CJ, Nichol, RJ, Novikov, A, Oberla, E, Olmedo, M, Prechelt, R, Rauch, BF, Roberts, JM, Romero-Wolf, A, Rotter, B, Russell, JW, Saltzberg, D, Seckel, D, Schoorlemmer, H, Shiao, J, Stafford, S, Stockham, J, Stockham, M, Strutt, B, Sutherland, MS, Varner, GS, Vieregg, AG, Wang, SH & Wissel, SA 2021, 'Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV', Physical review letters, vol. 126, no. 7, 071103. https://doi.org/10.1103/PhysRevLett.126.071103

TY - JOUR

T1 - Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV

AU - Gorham, P. W.

AU - Ludwig, A.

AU - Deaconu, C.

AU - Cao, P.

AU - Allison, P.

AU - Banerjee, O.

AU - Batten, L.

AU - Bhattacharya, D.

AU - Beatty, J. J.

AU - Belov, K.

AU - Binns, W. R.

AU - Bugaev, V.

AU - Chen, C. H.

AU - Chen, P.

AU - Chen, Y.

AU - Clem, J. M.

AU - Cremonesi, L.

AU - Dailey, B.

AU - Dowkontt, P. F.

AU - Fox, B. D.

AU - Gordon, J. W.H.

AU - Hast, C.

AU - Hill, B.

AU - Hsu, S. Y.

AU - Huang, J. J.

AU - Hughes, K.

AU - Hupe, R.

AU - Israel, M. H.

AU - Liu, T. C.

AU - Macchiarulo, L.

AU - Matsuno, S.

AU - McBride, K.

AU - Miki, C.

AU - Nam, J.

AU - Naudet, C. J.

AU - Nichol, R. J.

AU - Novikov, A.

AU - Oberla, E.

AU - Olmedo, M.

AU - Prechelt, R.

AU - Rauch, B. F.

AU - Roberts, J. M.

AU - Romero-Wolf, A.

AU - Rotter, B.

AU - Russell, J. W.

AU - Saltzberg, D.

AU - Seckel, D.

AU - Schoorlemmer, H.

AU - Shiao, J.

AU - Stafford, S.

AU - Stockham, J.

AU - Stockham, M.

AU - Strutt, B.

AU - Sutherland, M. S.

AU - Varner, G. S.

AU - Vieregg, A. G.

AU - Wang, S. H.

AU - Wissel, S. A.

PY - 2021/2/19

Y1 - 2021/2/19

N2 - ANITA's fourth long-duration balloon flight in 2016 detected 29 cosmic-ray (CR)-like events on a background of 0.37-0.17+0.27 anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a phase-inverted waveform polarity. However, four of the below-horizon CR-like events show anomalous noninverted polarity, a p=5.3×10-4 chance if due to background. All anomalous events are from locations near the horizon; ANITA-IV observed no steeply upcoming anomalous events similar to the two such events seen in prior flights.

AB - ANITA's fourth long-duration balloon flight in 2016 detected 29 cosmic-ray (CR)-like events on a background of 0.37-0.17+0.27 anthropogenic events. CRs are mainly seen in reflection off the Antarctic ice sheets, creating a phase-inverted waveform polarity. However, four of the below-horizon CR-like events show anomalous noninverted polarity, a p=5.3×10-4 chance if due to background. All anomalous events are from locations near the horizon; ANITA-IV observed no steeply upcoming anomalous events similar to the two such events seen in prior flights.

UR - https://www.scopus.com/pages/publications/85102404535

UR - https://www.scopus.com/pages/publications/85102404535#tab=citedBy

U2 - 10.1103/PhysRevLett.126.071103

DO - 10.1103/PhysRevLett.126.071103

M3 - Article

C2 - 33666466

AN - SCOPUS:85102404535

SN - 0031-9007

VL - 126

JO - Physical review letters

JF - Physical review letters

IS - 7

M1 - 071103

ER -

Unusual Near-Horizon Cosmic-Ray-like Events Observed by ANITA-IV

Abstract

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