The High-Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays and charged cosmic rays at TeV energies. The detector is still under construction, but data acquisition with the partially deployed detector started in 2013. An analysis of the cosmic-ray arrival direction distribution based on 4.9 × 1010 events recorded between 2013 June and 2014 February shows anisotropy at the 10-4 level on angular scales of about 10°. The HAWC cosmic-ray sky map exhibits three regions of significantly enhanced cosmic-ray flux; two of these regions were first reported by the Milagro experiment. A third region coincides with an excess recently reported by the ARGO-YBJ experiment. An angular power spectrum analysis of the sky shows that all terms up to l = 15 contribute significantly to the excesses.

Observation of small-scale anisotropy in the arrival direction distribution of TeV cosmic rays with HAWC / Abeysekara, A. U.; Alfaro, R.; Alvarez, C.; Alvarez, J. D.; Arceo, R.; Arteaga-Velazquez, J. C.; Solares, H. A. A.; Barber, A. S.; Baughman, B. M.; Bautista-Elivar, N.; Belmont, E.; Benzvi, S. Y.; Berley, D.; Rosales, M. B.; Braun, J.; Caballero-Mora, K. S.; Carraminana, A.; Castillo, M.; Cotti, U.; Cotzomi, J.; De La Fuente, E.; De Leon, C.; Deyoung, T.; Hernandez, R. D.; Diaz-Velez, J. C.; Dingus, B. L.; Duvernois, M. A.; Ellsworth, R. W.; Fiorino, D. W.; Fraija, N.; Galindo, A.; Garfias, F.; Gonzalez, M. M.; Goodman, J. A.; Gussert, M.; Hampel-Arias, Z.; Harding, J. P.; Huntemeyer, P.; Hui, C. M.; Imran, A.; Iriarte, A.; Karn, P.; Kieda, D.; Kunde, G. J.; Lara, A.; Lauer, R. J.; Lee, W. H.; Lennarz, D.; Vargas, H. L.; Linnemann, J. T.; Longo, M.; Luna-Garcia, R.; Malone, K.; Marinelli, A.; Marinelli, S. S.; Martinez, H.; Martinez, O.; Martinez-Castro, J.; Matthews, J. A. J.; Mcenery, J.; Torres, E. M.; Miranda-Romagnoli, P.; Moreno, E.; Mostafa, M.; Nellen, L.; Newbold, M.; Noriega-Papaqui, R.; Oceguera-Becerra, T.; Patricelli, B.; Pelayo, R.; Perez-Perez, E. G.; Pretz, J.; Rivire, C.; Rosa-Gonzalez, D.; Ruiz-Velasco, E.; Ryan, J.; Salazar, H.; Greus, F. S.; Sandoval, A.; Schneider, M.; Sinnis, G.; Smith, A. J.; Sparks Woodle, K.; Springer, R. W.; Taboada, I.; Toale, P. A.; Tollefson, K.; Torres, I.; Ukwatta, T. N.; Villasenor, L.; Weisgarber, T.; Westerhoff, S.; Wisher, I. G.; Wood, J.; Yodh, G. B.; Younk, P. W.; Zaborov, D.; Zepeda, A.; Zhou, H.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 796:2(2014), p. 108. [10.1088/0004-637X/796/2/108]

Observation of small-scale anisotropy in the arrival direction distribution of TeV cosmic rays with HAWC

Marinelli A.;
2014

Abstract

The High-Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays and charged cosmic rays at TeV energies. The detector is still under construction, but data acquisition with the partially deployed detector started in 2013. An analysis of the cosmic-ray arrival direction distribution based on 4.9 × 1010 events recorded between 2013 June and 2014 February shows anisotropy at the 10-4 level on angular scales of about 10°. The HAWC cosmic-ray sky map exhibits three regions of significantly enhanced cosmic-ray flux; two of these regions were first reported by the Milagro experiment. A third region coincides with an excess recently reported by the ARGO-YBJ experiment. An angular power spectrum analysis of the sky shows that all terms up to l = 15 contribute significantly to the excesses.
2014
Observation of small-scale anisotropy in the arrival direction distribution of TeV cosmic rays with HAWC / Abeysekara, A. U.; Alfaro, R.; Alvarez, C.; Alvarez, J. D.; Arceo, R.; Arteaga-Velazquez, J. C.; Solares, H. A. A.; Barber, A. S.; Baughman, B. M.; Bautista-Elivar, N.; Belmont, E.; Benzvi, S. Y.; Berley, D.; Rosales, M. B.; Braun, J.; Caballero-Mora, K. S.; Carraminana, A.; Castillo, M.; Cotti, U.; Cotzomi, J.; De La Fuente, E.; De Leon, C.; Deyoung, T.; Hernandez, R. D.; Diaz-Velez, J. C.; Dingus, B. L.; Duvernois, M. A.; Ellsworth, R. W.; Fiorino, D. W.; Fraija, N.; Galindo, A.; Garfias, F.; Gonzalez, M. M.; Goodman, J. A.; Gussert, M.; Hampel-Arias, Z.; Harding, J. P.; Huntemeyer, P.; Hui, C. M.; Imran, A.; Iriarte, A.; Karn, P.; Kieda, D.; Kunde, G. J.; Lara, A.; Lauer, R. J.; Lee, W. H.; Lennarz, D.; Vargas, H. L.; Linnemann, J. T.; Longo, M.; Luna-Garcia, R.; Malone, K.; Marinelli, A.; Marinelli, S. S.; Martinez, H.; Martinez, O.; Martinez-Castro, J.; Matthews, J. A. J.; Mcenery, J.; Torres, E. M.; Miranda-Romagnoli, P.; Moreno, E.; Mostafa, M.; Nellen, L.; Newbold, M.; Noriega-Papaqui, R.; Oceguera-Becerra, T.; Patricelli, B.; Pelayo, R.; Perez-Perez, E. G.; Pretz, J.; Rivire, C.; Rosa-Gonzalez, D.; Ruiz-Velasco, E.; Ryan, J.; Salazar, H.; Greus, F. S.; Sandoval, A.; Schneider, M.; Sinnis, G.; Smith, A. J.; Sparks Woodle, K.; Springer, R. W.; Taboada, I.; Toale, P. A.; Tollefson, K.; Torres, I.; Ukwatta, T. N.; Villasenor, L.; Weisgarber, T.; Westerhoff, S.; Wisher, I. G.; Wood, J.; Yodh, G. B.; Younk, P. W.; Zaborov, D.; Zepeda, A.; Zhou, H.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 796:2(2014), p. 108. [10.1088/0004-637X/796/2/108]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/944015
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