All-particle cosmic ray energy spectrum measured with 26 IceTop stations

We report on a measurement of the cosmic ray energy spectrum with the IceTop air shower array, the surface component of the IceCube Neutrino Observatory at the South Pole. The data used in this analysis were taken between June and October, 2007, with 26 surface stations operational at that time, cor...

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Main Authors:	Abbasi, R., Abdou, Y., Abu-Zayyad, T., Ackermann, M., Adams, J., Aguilar, J., Ahlers, M., Altmann, D., Andeen, K., Auffenberg, J., Bai, X., Baker, M., Barwick, S., Baum, V., Bay, R., Bazo Alba, J., Beattie, K., Beatty, J., Bechet, S., Becker, J., Becker, K., Bell, M., Benabderrahmane, M., Benzvi, S., Berdermann, J., Berghaus, P., Berley, D., Bernardini, E., Bertrand, D., Besson, D., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D., Bohm, C., Bose, D., Böser, S., Botner, O., Brayeur, L., Brown, A., Buitink, S., Caballero-Mora, K., Carson, Michael, Casier, M., Chirkin, D., Christy, B., Clevermann, F., Cohen, S., Cowen, D., Cruz Silva, A., D'Agostino, M., Danninger, M., Daughhetee, J., Davis, J., De Clercq, C., Degner, T., Descamps, F., Desiati, P., De Vries-Uiterweerd, G., Deyoung, T., Díaz-Vélez, J., Dreyer, J., Dumm, J., Dunkman, M., Eisch, J., Ellsworth, R., Engdegård, O., Euler, S., Evenson, P., Fadiran, O., Fazely, A., Fedynitch, A., Feintzeig, J., Feusels, T., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Franckowiak, A., Franke, R., Gaisser, T., Gallagher, J., Gerhardt, L., Gladstone, L., Glüsenkamp, T., Goldschmidt, A., Goodman, J., Góra, D., Grant, D., Groß, A., Grullon, S., Gurtner, M., Ha, C., Haj Ismail, A., Hallgren, A.
Format:	Journal Article
Published:	2013
Online Access:	http://hdl.handle.net/20.500.11937/12493

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author	Abbasi, R. Abdou, Y. Abu-Zayyad, T. Ackermann, M. Adams, J. Aguilar, J. Ahlers, M. Altmann, D. Andeen, K. Auffenberg, J. Bai, X. Baker, M. Barwick, S. Baum, V. Bay, R. Bazo Alba, J. Beattie, K. Beatty, J. Bechet, S. Becker, J. Becker, K. Bell, M. Benabderrahmane, M. Benzvi, S. Berdermann, J. Berghaus, P. Berley, D. Bernardini, E. Bertrand, D. Besson, D. Bindig, D. Bissok, M. Blaufuss, E. Blumenthal, J. Boersma, D. Bohm, C. Bose, D. Böser, S. Botner, O. Brayeur, L. Brown, A. Buitink, S. Caballero-Mora, K. Carson, Michael Casier, M. Chirkin, D. Christy, B. Clevermann, F. Cohen, S. Cowen, D. Cruz Silva, A. D'Agostino, M. Danninger, M. Daughhetee, J. Davis, J. De Clercq, C. Degner, T. Descamps, F. Desiati, P. De Vries-Uiterweerd, G. Deyoung, T. Díaz-Vélez, J. Dreyer, J. Dumm, J. Dunkman, M. Eisch, J. Ellsworth, R. Engdegård, O. Euler, S. Evenson, P. Fadiran, O. Fazely, A. Fedynitch, A. Feintzeig, J. Feusels, T. Filimonov, K. Finley, C. Fischer-Wasels, T. Flis, S. Franckowiak, A. Franke, R. Gaisser, T. Gallagher, J. Gerhardt, L. Gladstone, L. Glüsenkamp, T. Goldschmidt, A. Goodman, J. Góra, D. Grant, D. Groß, A. Grullon, S. Gurtner, M. Ha, C. Haj Ismail, A. Hallgren, A.
author_facet	Abbasi, R. Abdou, Y. Abu-Zayyad, T. Ackermann, M. Adams, J. Aguilar, J. Ahlers, M. Altmann, D. Andeen, K. Auffenberg, J. Bai, X. Baker, M. Barwick, S. Baum, V. Bay, R. Bazo Alba, J. Beattie, K. Beatty, J. Bechet, S. Becker, J. Becker, K. Bell, M. Benabderrahmane, M. Benzvi, S. Berdermann, J. Berghaus, P. Berley, D. Bernardini, E. Bertrand, D. Besson, D. Bindig, D. Bissok, M. Blaufuss, E. Blumenthal, J. Boersma, D. Bohm, C. Bose, D. Böser, S. Botner, O. Brayeur, L. Brown, A. Buitink, S. Caballero-Mora, K. Carson, Michael Casier, M. Chirkin, D. Christy, B. Clevermann, F. Cohen, S. Cowen, D. Cruz Silva, A. D'Agostino, M. Danninger, M. Daughhetee, J. Davis, J. De Clercq, C. Degner, T. Descamps, F. Desiati, P. De Vries-Uiterweerd, G. Deyoung, T. Díaz-Vélez, J. Dreyer, J. Dumm, J. Dunkman, M. Eisch, J. Ellsworth, R. Engdegård, O. Euler, S. Evenson, P. Fadiran, O. Fazely, A. Fedynitch, A. Feintzeig, J. Feusels, T. Filimonov, K. Finley, C. Fischer-Wasels, T. Flis, S. Franckowiak, A. Franke, R. Gaisser, T. Gallagher, J. Gerhardt, L. Gladstone, L. Glüsenkamp, T. Goldschmidt, A. Goodman, J. Góra, D. Grant, D. Groß, A. Grullon, S. Gurtner, M. Ha, C. Haj Ismail, A. Hallgren, A.
author_sort	Abbasi, R.
building	Curtin Institutional Repository
collection	Online Access
description	We report on a measurement of the cosmic ray energy spectrum with the IceTop air shower array, the surface component of the IceCube Neutrino Observatory at the South Pole. The data used in this analysis were taken between June and October, 2007, with 26 surface stations operational at that time, corresponding to about one third of the final array. The fiducial area used in this analysis was 0.122 km2. The analysis investigated the energy spectrum from 1 to 100 PeV measured for three different zenith angle ranges between 0° and 46°. Because of the isotropy of cosmic rays in this energy range the spectra from all zenith angle intervals have to agree. The cosmic-ray energy spectrum was determined under different assumptions on the primary mass composition. Good agreement of spectra in the three zenith angle ranges was found for the assumption of pure proton and a simple two-component model. For zenith angles θ < 30°, where the mass dependence is smallest, the knee in the cosmic ray energy spectrum was observed at about 4 PeV, with a spectral index above the knee of about −3.1. Moreover, an indication of a flattening of the spectrum above 22 PeV was observed.
first_indexed	2025-11-14T06:59:32Z
format	Journal Article
id	curtin-20.500.11937-12493
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T06:59:32Z
publishDate	2013
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-124932018-03-29T09:06:08Z All-particle cosmic ray energy spectrum measured with 26 IceTop stations Abbasi, R. Abdou, Y. Abu-Zayyad, T. Ackermann, M. Adams, J. Aguilar, J. Ahlers, M. Altmann, D. Andeen, K. Auffenberg, J. Bai, X. Baker, M. Barwick, S. Baum, V. Bay, R. Bazo Alba, J. Beattie, K. Beatty, J. Bechet, S. Becker, J. Becker, K. Bell, M. Benabderrahmane, M. Benzvi, S. Berdermann, J. Berghaus, P. Berley, D. Bernardini, E. Bertrand, D. Besson, D. Bindig, D. Bissok, M. Blaufuss, E. Blumenthal, J. Boersma, D. Bohm, C. Bose, D. Böser, S. Botner, O. Brayeur, L. Brown, A. Buitink, S. Caballero-Mora, K. Carson, Michael Casier, M. Chirkin, D. Christy, B. Clevermann, F. Cohen, S. Cowen, D. Cruz Silva, A. D'Agostino, M. Danninger, M. Daughhetee, J. Davis, J. De Clercq, C. Degner, T. Descamps, F. Desiati, P. De Vries-Uiterweerd, G. Deyoung, T. Díaz-Vélez, J. Dreyer, J. Dumm, J. Dunkman, M. Eisch, J. Ellsworth, R. Engdegård, O. Euler, S. Evenson, P. Fadiran, O. Fazely, A. Fedynitch, A. Feintzeig, J. Feusels, T. Filimonov, K. Finley, C. Fischer-Wasels, T. Flis, S. Franckowiak, A. Franke, R. Gaisser, T. Gallagher, J. Gerhardt, L. Gladstone, L. Glüsenkamp, T. Goldschmidt, A. Goodman, J. Góra, D. Grant, D. Groß, A. Grullon, S. Gurtner, M. Ha, C. Haj Ismail, A. Hallgren, A. We report on a measurement of the cosmic ray energy spectrum with the IceTop air shower array, the surface component of the IceCube Neutrino Observatory at the South Pole. The data used in this analysis were taken between June and October, 2007, with 26 surface stations operational at that time, corresponding to about one third of the final array. The fiducial area used in this analysis was 0.122 km2. The analysis investigated the energy spectrum from 1 to 100 PeV measured for three different zenith angle ranges between 0° and 46°. Because of the isotropy of cosmic rays in this energy range the spectra from all zenith angle intervals have to agree. The cosmic-ray energy spectrum was determined under different assumptions on the primary mass composition. Good agreement of spectra in the three zenith angle ranges was found for the assumption of pure proton and a simple two-component model. For zenith angles θ < 30°, where the mass dependence is smallest, the knee in the cosmic ray energy spectrum was observed at about 4 PeV, with a spectral index above the knee of about −3.1. Moreover, an indication of a flattening of the spectrum above 22 PeV was observed. 2013 Journal Article http://hdl.handle.net/20.500.11937/12493 10.1016/j.astropartphys.2013.01.016 restricted
spellingShingle	Abbasi, R. Abdou, Y. Abu-Zayyad, T. Ackermann, M. Adams, J. Aguilar, J. Ahlers, M. Altmann, D. Andeen, K. Auffenberg, J. Bai, X. Baker, M. Barwick, S. Baum, V. Bay, R. Bazo Alba, J. Beattie, K. Beatty, J. Bechet, S. Becker, J. Becker, K. Bell, M. Benabderrahmane, M. Benzvi, S. Berdermann, J. Berghaus, P. Berley, D. Bernardini, E. Bertrand, D. Besson, D. Bindig, D. Bissok, M. Blaufuss, E. Blumenthal, J. Boersma, D. Bohm, C. Bose, D. Böser, S. Botner, O. Brayeur, L. Brown, A. Buitink, S. Caballero-Mora, K. Carson, Michael Casier, M. Chirkin, D. Christy, B. Clevermann, F. Cohen, S. Cowen, D. Cruz Silva, A. D'Agostino, M. Danninger, M. Daughhetee, J. Davis, J. De Clercq, C. Degner, T. Descamps, F. Desiati, P. De Vries-Uiterweerd, G. Deyoung, T. Díaz-Vélez, J. Dreyer, J. Dumm, J. Dunkman, M. Eisch, J. Ellsworth, R. Engdegård, O. Euler, S. Evenson, P. Fadiran, O. Fazely, A. Fedynitch, A. Feintzeig, J. Feusels, T. Filimonov, K. Finley, C. Fischer-Wasels, T. Flis, S. Franckowiak, A. Franke, R. Gaisser, T. Gallagher, J. Gerhardt, L. Gladstone, L. Glüsenkamp, T. Goldschmidt, A. Goodman, J. Góra, D. Grant, D. Groß, A. Grullon, S. Gurtner, M. Ha, C. Haj Ismail, A. Hallgren, A. All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title	All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title_full	All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title_fullStr	All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title_full_unstemmed	All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title_short	All-particle cosmic ray energy spectrum measured with 26 IceTop stations
title_sort	all-particle cosmic ray energy spectrum measured with 26 icetop stations
url	http://hdl.handle.net/20.500.11937/12493

All-particle cosmic ray energy spectrum measured with 26 IceTop stations

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