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  • Corstanje, A.Radboud University Nijmegen, Netherlands (author)

The effect of the atmospheric refractive index on the radio signal of extensive air showers

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • Elsevier,2017
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:lnu-64215
  • https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-64215URI
  • https://doi.org/10.1016/j.astropartphys.2017.01.009DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • For the interpretation of measurements of radio emission from extensive air showers, an important systematic uncertainty arises from natural variations of the atmospheric refractive index n. At a given altitude, the refractivity N = 10(6) (n - 1) can have relative variations on the order of 10% depending on temperature, humidity, and air pressure. Typical corrections to be applied to N are about 4%. Using CoREAS simulations of radio emission from air showers, we have evaluated the effect of varying N on measurements of the depth of shower maximum X-max. For an observation band of 30-80 MHz, a difference of 4% in refractivity gives rise to a systematic error in the inferred X-max between 3.5 and 11 g/cm(2), for proton showers with zenith angles ranging from 15 to 50 degrees. At higher frequencies, from 120 to 250 MHz, the offset ranges from 10 to 22 g/cm(2). These offsets were found to be proportional to the geometric distance to X-max. We have compared the results to a simple model based on the Cherenkov angle. For the 120-250 MHz band, the model is in qualitative agreement with the simulations. In typical circumstances, we find a slight decrease in X-max compared to the default refractivity treatment in CoREAS. While this is within commonly treated systematic uncertainties, accounting for it explicitly improves the accuracy of X-max measurements. (C) 2017 Elsevier B.V. All rights reserved.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Bonardi, A.Radboud University Nijmegen, Netherlands (author)
  • Buitink, S.Radboud University Nijmegen, Netherlands ; Vrije Universiteit Brussel, Belgium (author)
  • Falcke, H.Radboud University Nijmegen, Netherlands ; ASTRON Netherlands Institute for Radio Astronomy, Netherlands ; Nikhef, Sci Pk Amsterdam, NL-1098 XG Amsterdam, Netherlands.;Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany. (author)
  • Horandel, J. R.Radboud University Nijmegen, Netherlands ;Nikhef, Sci Pk Amsterdam, NL-1098 XG Amsterdam, Netherlands. (author)
  • Mitra, R.Vrije Univ Brussel, Inst Astrophys, Pleinlaan 2, B-1050 Brussels, Belgium. (author)
  • Mulrey, K.Vrije Univ Brussel, Inst Astrophys, Pleinlaan 2, B-1050 Brussels, Belgium. (author)
  • Nelles, A.Radboud University Nijmegen, Netherlands ;Nikhef, Sci Pk Amsterdam, NL-1098 XG Amsterdam, Netherlands.;Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. (author)
  • Rachen, J. P.Radboud University Nijmegen, Netherlands (author)
  • Rossetto, L.Radboud University Nijmegen, Netherlands (author)
  • Schellart, P.Radboud University Nijmegen, Netherlands ;Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. (author)
  • Scholten, O.Vrije Univ Brussel, Interuniv Inst High Energy, Pleinlaan 2, B-1050 Brussels, Belgium.;Univ Groningen, POB 72, NL-9700 AB Groningen, Netherlands. (author)
  • ter Veen, S.Radboud University Nijmegen, Netherlands (author)
  • Thoudam, SatyendraLinnéuniversitetet,Institutionen för fysik och elektroteknik (IFE),Radboud University Nijmegen, Netherlands(Swepub:lnu)sathaa (author)
  • Trinh, G.Univ Groningen, POB 72, NL-9700 AB Groningen, Netherlands. (author)
  • Winchen, T.Vrije Univ Brussel, Inst Astrophys, Pleinlaan 2, B-1050 Brussels, Belgium. (author)
  • Radboud University Nijmegen, NetherlandsRadboud University Nijmegen, Netherlands ; Vrije Universiteit Brussel, Belgium (creator_code:org_t)

Related titles

  • In:Astroparticle physics: Elsevier89, s. 23-290927-65051873-2852

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