Full-Sky Analysis of Cosmic-Ray Anisotropy with IceCube and HAWC

TY - GEN

T1 - Full-Sky Analysis of Cosmic-Ray Anisotropy with IceCube and HAWC

AU - Abeysekara, Anushka Udara

AU - Alfaro, Ruben

AU - Alvarez, César

AU - Arceo, Roberto

AU - Berley, D.

AU - Arteaga-Velázquez, J.C.

AU - Gonzalez, Josefa

AU - Koskinen, David Jason

AU - Larson, Michael James

AU - Sarkar, Subir

PY - 2015/10/14

Y1 - 2015/10/14

N2 - During the past two decades, experiments in both the Northern and Southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of galactic cosmic rays. The relative amplitude of the anisotropy is 10-4 -10-3. However, each of these individual measurements is restricted by limited sky coverage, and so the pseudo-power spectrum of the anisotropy obtained from any one measurement displays a systematic correlation between different multipole modes C. To address this issue, we present the preliminary status of a joint analysis of the anisotropy on all angular scales using cosmic-ray data from the IceCube Neutrino Observatory located at the South Pole (90 S) and the High-Altitude Water Cherenkov (HAWC) Observatory located at Sierra Negra, Mexico (19 N). We describe the methods used to combine the IceCube and HAWC data, address the individual detector systematics and study the region of overlapping field of view between the two observatories.

AB - During the past two decades, experiments in both the Northern and Southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of galactic cosmic rays. The relative amplitude of the anisotropy is 10-4 -10-3. However, each of these individual measurements is restricted by limited sky coverage, and so the pseudo-power spectrum of the anisotropy obtained from any one measurement displays a systematic correlation between different multipole modes C. To address this issue, we present the preliminary status of a joint analysis of the anisotropy on all angular scales using cosmic-ray data from the IceCube Neutrino Observatory located at the South Pole (90 S) and the High-Altitude Water Cherenkov (HAWC) Observatory located at Sierra Negra, Mexico (19 N). We describe the methods used to combine the IceCube and HAWC data, address the individual detector systematics and study the region of overlapping field of view between the two observatories.

M3 - Article in proceedings

BT - Proceedings, 34th International Cosmic Ray Conference (ICRC 2015)

ER -