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BibTex format

@inproceedings{Windischhofer:2025:10.22323/1.501.1213,
author = {Windischhofer, P and Alden, N and Alden, N and Ali, S and Allison, P and Archambault, S and Beatty, JJ and Besson, DZ and Bishop, A and Chen, P and Chen, YC and Chen, YC and Chiche, S and Clark, BA and Connolly, A and Couberly, K and Cremonesi, L and Cummings, A and Dasgupta, P and Debolt, R and de, Kockere S and de, Vries KD and Deaconu, C and DuVernois, MA and Flaherty, J and Friedman, E and Gaior, R and Giri, P and Hanson, J and Harty, N and Hoffman, KD and Huang, MH and Hughes, K and Ishihara, A and Karle, A and Kelley, JL and Kim, KC and Kim, MC and Kravchenko, I and Krebs, R and Kuo, CY and Kurusu, K and Latif, UA and Liu, CH and Liu, TC and Luszczak, W and Machtay, A and Mase, K and Muzio, MS and Nam, J and Nichol, RJ and Novikov, A and Nozdrina, A and Oberla, E and Pai, CW and Pan, Y and Pfendner, C and Punsuebsay, N and Roth, J and Salcedo-Gomez, A and Seckel, D and Seikh, MFH and Shiao, YS and Su, SC and Toscano, S and Torres, J and Touart, J and van, Eijndhoven N and Vieregg},
doi = {10.22323/1.501.1213},
title = {Observation of Broadband In-ice Radiation from Impacting High-Energy Cosmic Rays},
url = {http://dx.doi.org/10.22323/1.501.1213},
year = {2025}
}
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TY  - CPAPER
AB  - We present the first experimental evidence for in-ice radiofrequency emission from high-energy particle cascades developing in the Antarctic ice sheet. In 208 days of data recorded with the phased-array trigger of the Askaryan Radio Array, we detect 13 events with impulsive radiofrequency pulses originating from below the ice surface. Considering only the arrival angles and timing properties, this rate is inconsistent with an a-posteriori background expectation for thermal noise events and on-surface events at the level of 3.5 σ, which rises to 5.1 σ when additionally considering impulsivity. The observed event geometry, event rate, signal shape, spectral content, and electric field polarization are consistent with Askaryan radiation from cosmic ray air shower cores impacting the ice sheet. For the brightest events, the angular radiation pattern independently favors an extended cascade-like emitter over a pointlike source.
AU  - Windischhofer,P
AU  - Alden,N
AU  - Alden,N
AU  - Ali,S
AU  - Allison,P
AU  - Archambault,S
AU  - Beatty,JJ
AU  - Besson,DZ
AU  - Bishop,A
AU  - Chen,P
AU  - Chen,YC
AU  - Chen,YC
AU  - Chiche,S
AU  - Clark,BA
AU  - Connolly,A
AU  - Couberly,K
AU  - Cremonesi,L
AU  - Cummings,A
AU  - Dasgupta,P
AU  - Debolt,R
AU  - de,Kockere S
AU  - de,Vries KD
AU  - Deaconu,C
AU  - DuVernois,MA
AU  - Flaherty,J
AU  - Friedman,E
AU  - Gaior,R
AU  - Giri,P
AU  - Hanson,J
AU  - Harty,N
AU  - Hoffman,KD
AU  - Huang,MH
AU  - Hughes,K
AU  - Ishihara,A
AU  - Karle,A
AU  - Kelley,JL
AU  - Kim,KC
AU  - Kim,MC
AU  - Kravchenko,I
AU  - Krebs,R
AU  - Kuo,CY
AU  - Kurusu,K
AU  - Latif,UA
AU  - Liu,CH
AU  - Liu,TC
AU  - Luszczak,W
AU  - Machtay,A
AU  - Mase,K
AU  - Muzio,MS
AU  - Nam,J
AU  - Nichol,RJ
AU  - Novikov,A
AU  - Nozdrina,A
AU  - Oberla,E
AU  - Pai,CW
AU  - Pan,Y
AU  - Pfendner,C
AU  - Punsuebsay,N
AU  - Roth,J
AU  - Salcedo-Gomez,A
AU  - Seckel,D
AU  - Seikh,MFH
AU  - Shiao,YS
AU  - Su,SC
AU  - Toscano,S
AU  - Torres,J
AU  - Touart,J
AU  - van,Eijndhoven N
AU  - Vieregg,A
AU  - Fostier,MV
AU  - Wang,MZ
AU  - Wang,SH
AU  - Wissel,SA
AU  - Xie,C
AU  - Yoshida,S
AU  - Young,R
DO  - 10.22323/1.501.1213
PY  - 2025///
TI  - Observation of Broadband In-ice Radiation from Impacting High-Energy Cosmic Rays
UR  - http://dx.doi.org/10.22323/1.501.1213
ER  -
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