A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation

M. Aglietta; B. Alessandro; P. Antonioli; F. Arneodo; L. Bergamasco; M. Bertaina; A. Campos Fauth; C. Castagnoli; A. Castellina; A. Chiavassa; G. Cini Castagnoli; B. D'Ettorre Piazzoli; G. Di Sciascio; W. Fulgione; P. Galeotti; P. L. Ghia; R. Granella; M. Iacovacci; A. Lima De Godoi; G. Mannocchi; C. Melagrana; N. Mengotti Silva; C. Morello; G. Navarra; H. Nogima; L. Riccati; O. Saavedra; G. C. Trinchero; P. Vallania; S. Vernetto; C. Vigorito

doi:10.1016/S0927-6505(96)00045-X

A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation

M. Aglietta, B. Alessandro, P. Antonioli, F. Arneodo, L. Bergamasco, M. Bertaina, A. Campos Fauth, C. Castagnoli, A. Castellina, A. Chiavassa, G. Cini Castagnoli, B. D'Ettorre Piazzoli, G. Di Sciascio, W. Fulgione, P. Galeotti, P. L. Ghia, R. Granella, M. Iacovacci, A. Lima De Godoi, G. MannocchiC. Melagrana, N. Mengotti Silva, C. Morello, G. Navarra, H. Nogima, L. Riccati, O. Saavedra, G. C. Trinchero, P. Vallania, S. Vernetto, C. Vigorito

Physics

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

Abstract

An upper limit to the flux of Ultra High Energy (UHE) γ-rays in the primary cosmic radiation is obtained through the data of the electromagnetic and the muon detectors of the EAS-TOP Extensive Air Shower array (Campo Imperatore, National Gran Sasso Laboratories, atmospheric depth 810g cm^-2). The search is performed by selecting Extensive Air Showers (EAS) with low muon content. For EAS electron sizes N_e > 6.3 · 10⁵, no showers are observed with the core located inside a fiducial area and no muons recorded in the 140 m² muon detector, during a live time of 8440 h. The 90% c.l. upper limit to the relative intensity of γ-ray with respect to cosmic ray (c.r.) primaries is I_γ/I_c.r. < 7.3 · 10^-5, at primary energy E₀ ≥ 10¹⁵ eV: this limit is lower than reported in previous measurements.

Original language	English (US)
Pages (from-to)	71-75
Number of pages	5
Journal	Astroparticle Physics
Volume	6
Issue number	1
DOIs	https://doi.org/10.1016/S0927-6505(96)00045-X
State	Published - Dec 1996

Keywords

Cosmic rays
Gamma rays

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.1016/S0927-6505(96)00045-X

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Aglietta, M., Alessandro, B., Antonioli, P., Arneodo, F., Bergamasco, L., Bertaina, M., Campos Fauth, A., Castagnoli, C., Castellina, A., Chiavassa, A., Cini Castagnoli, G., D'Ettorre Piazzoli, B., Di Sciascio, G., Fulgione, W., Galeotti, P., Ghia, P. L., Granella, R., Iacovacci, M., Lima De Godoi, A., ... Vigorito, C. (1996). A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation. Astroparticle Physics, 6(1), 71-75. https://doi.org/10.1016/S0927-6505(96)00045-X

Aglietta, M, Alessandro, B, Antonioli, P, Arneodo, F, Bergamasco, L, Bertaina, M, Campos Fauth, A, Castagnoli, C, Castellina, A, Chiavassa, A, Cini Castagnoli, G, D'Ettorre Piazzoli, B, Di Sciascio, G, Fulgione, W, Galeotti, P, Ghia, PL, Granella, R, Iacovacci, M, Lima De Godoi, A, Mannocchi, G, Melagrana, C, Mengotti Silva, N, Morello, C, Navarra, G, Nogima, H, Riccati, L, Saavedra, O, Trinchero, GC, Vallania, P, Vernetto, S & Vigorito, C 1996, 'A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation', Astroparticle Physics, vol. 6, no. 1, pp. 71-75. https://doi.org/10.1016/S0927-6505(96)00045-X

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title = "A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation",

abstract = "An upper limit to the flux of Ultra High Energy (UHE) γ-rays in the primary cosmic radiation is obtained through the data of the electromagnetic and the muon detectors of the EAS-TOP Extensive Air Shower array (Campo Imperatore, National Gran Sasso Laboratories, atmospheric depth 810g cm-2). The search is performed by selecting Extensive Air Showers (EAS) with low muon content. For EAS electron sizes Ne > 6.3 · 105, no showers are observed with the core located inside a fiducial area and no muons recorded in the 140 m2 muon detector, during a live time of 8440 h. The 90% c.l. upper limit to the relative intensity of γ-ray with respect to cosmic ray (c.r.) primaries is Iγ/Ic.r. < 7.3 · 10-5, at primary energy E0 ≥ 1015 eV: this limit is lower than reported in previous measurements.",

keywords = "Cosmic rays, Gamma rays",

author = "M. Aglietta and B. Alessandro and P. Antonioli and F. Arneodo and L. Bergamasco and M. Bertaina and {Campos Fauth}, A. and C. Castagnoli and A. Castellina and A. Chiavassa and {Cini Castagnoli}, G. and {D'Ettorre Piazzoli}, B. and {Di Sciascio}, G. and W. Fulgione and P. Galeotti and Ghia, {P. L.} and R. Granella and M. Iacovacci and {Lima De Godoi}, A. and G. Mannocchi and C. Melagrana and {Mengotti Silva}, N. and C. Morello and G. Navarra and H. Nogima and L. Riccati and O. Saavedra and Trinchero, {G. C.} and P. Vallania and S. Vernetto and C. Vigorito",

year = "1996",

month = dec,

doi = "10.1016/S0927-6505(96)00045-X",

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T1 - A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation

AU - Aglietta, M.

AU - Alessandro, B.

AU - Antonioli, P.

AU - Arneodo, F.

AU - Bergamasco, L.

AU - Bertaina, M.

AU - Campos Fauth, A.

AU - Castagnoli, C.

AU - Castellina, A.

AU - Chiavassa, A.

AU - Cini Castagnoli, G.

AU - D'Ettorre Piazzoli, B.

AU - Di Sciascio, G.

AU - Fulgione, W.

AU - Galeotti, P.

AU - Ghia, P. L.

AU - Granella, R.

AU - Iacovacci, M.

AU - Lima De Godoi, A.

AU - Mannocchi, G.

AU - Melagrana, C.

AU - Mengotti Silva, N.

AU - Morello, C.

AU - Navarra, G.

AU - Nogima, H.

AU - Riccati, L.

AU - Saavedra, O.

AU - Trinchero, G. C.

AU - Vallania, P.

AU - Vernetto, S.

AU - Vigorito, C.

PY - 1996/12

Y1 - 1996/12

N2 - An upper limit to the flux of Ultra High Energy (UHE) γ-rays in the primary cosmic radiation is obtained through the data of the electromagnetic and the muon detectors of the EAS-TOP Extensive Air Shower array (Campo Imperatore, National Gran Sasso Laboratories, atmospheric depth 810g cm-2). The search is performed by selecting Extensive Air Showers (EAS) with low muon content. For EAS electron sizes Ne > 6.3 · 105, no showers are observed with the core located inside a fiducial area and no muons recorded in the 140 m2 muon detector, during a live time of 8440 h. The 90% c.l. upper limit to the relative intensity of γ-ray with respect to cosmic ray (c.r.) primaries is Iγ/Ic.r. < 7.3 · 10-5, at primary energy E0 ≥ 1015 eV: this limit is lower than reported in previous measurements.

AB - An upper limit to the flux of Ultra High Energy (UHE) γ-rays in the primary cosmic radiation is obtained through the data of the electromagnetic and the muon detectors of the EAS-TOP Extensive Air Shower array (Campo Imperatore, National Gran Sasso Laboratories, atmospheric depth 810g cm-2). The search is performed by selecting Extensive Air Showers (EAS) with low muon content. For EAS electron sizes Ne > 6.3 · 105, no showers are observed with the core located inside a fiducial area and no muons recorded in the 140 m2 muon detector, during a live time of 8440 h. The 90% c.l. upper limit to the relative intensity of γ-ray with respect to cosmic ray (c.r.) primaries is Iγ/Ic.r. < 7.3 · 10-5, at primary energy E0 ≥ 1015 eV: this limit is lower than reported in previous measurements.

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ER -

A limit to the rate of ultra high energy γ-rays in the primary cosmic radiation

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