2018ApJ...862...91A

Query : 2018ApJ...862...91A

2018ApJ...862...91A - Astrophys. J., 862, 91-91 (2018/August-1)

Evidence of intermediate-scale energy spectrum anisotropy of cosmic rays E >= 1019.2 eV with the Telescope Array surface detector.

ABBASI R.U., ABE M., ABU-ZAYYAD T., ALLEN M., AZUMA R., BARCIKOWSKI E., BELZ J.W., BERGMAN D.R., BLAKE S.A., CADY R., CHEON B.G., CHIBA J., CHIKAWA M., DI MATTEO A., FUJII T., FUJITA K., FUKUSHIMA M., FURLICH G., GOTO T., HANLON W., HAYASHI M., HAYASHI Y., HAYASHIDA N., HIBINO K., HONDA K., IKEDA D., INOUE N., ISHII T., ISHIMORI R., ITO H., IVANOV D., JEONG H.M., JEONG S., JUI C.C.H., KADOTA K., KAKIMOTO F., KALASHEV O., KASAHARA K., KAWAI H., KAWAKAMI S., KAWANA S., KAWATA K., KIDO E., KIM H.B., KIM J.H., KIM J.H., KISHIGAMI S., KITAMURA S., KITAMURA Y., KUZMIN V., KUZNETSOV M., KWON Y.J., LEE K.H., LUBSANDORZHIEV B., LUNDQUIST J.P., MACHIDA K., MARTENS K., MATSUYAMA T., MATTHEWS J.N., MAYTA R., MINAMINO M., MUKAI K., MYERS I., NAGASAWA K., NAGATAKI S., NAKAMURA R., NAKAMURA T., NONAKA T., NOZATO A., ODA H., OGIO S., OGURA J., OHNISHI M., OHOKA H., OKUDA T., OMURA Y., ONO M., ONOGI R., OSHIMA A., OZAWA S., PARK I.H., PSHIRKOV M.S., RODRIGUEZ D.C., RUBTSOV G., RYU D., SAGAWA H., SAHARA R., SAITO K., SAITO Y., SAKAKI N., SAKURAI N., SCOTT L.M., SEKI T., SEKINO K., SHAH P.D., SHIBATA F., SHIBATA T., SHIMODAIRA H., SHIN B.K., SHIN H.S., SMITH J.D., SOKOLSKY P., STOKES B.T., STRATTON S.R., STROMAN T.A., SUZAWA T., TAKAGI Y., TAKAHASHI Y., TAKAMURA M., TAKEISHI R., TAKETA A., TAKITA M., TAMEDA Y., TANAKA H., TANAKA K., TANAKA M., THOMAS S.B., THOMSON G.B., TINYAKOV P., TKACHEV I., TOKUNO H., TOMIDA T., TROITSKY S., TSUNESADA Y., TSUTSUMI K., UCHIHORI Y., UDO S., URBAN F., WONG T., YAMAMOTO M., YAMANE R., YAMAOKA H., YAMAZAKI K., YANG J., YASHIRO K., YONEDA Y., YOSHIDA S., YOSHII H., ZHEZHER Y. and ZUNDEL Z.

Abstract (from CDS):

Evidence for an intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high energy cosmic rays for energies greater than 1019.2 eV in the northern hemisphere using 7 years of Telescope Array surface detector data. A relative energy distribution test is done comparing events inside oversampled spherical caps of equal exposure, to those outside, using the Poisson likelihood ratio. The center of maximum significance is at 9h16m, 45°, and has a deficit of events with energies 1019.2 <= E < 1019.75 eV and an excess for E >= 1019.75 eV. The post-trial probability of this energy anisotropy, appearing by chance anywhere on an isotropic sky, is found by Monte Carlo simulation to be 9 x 10–5 (3.74σglobal).

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): astroparticle physics - cosmic rays - large-scale structure of universe

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
2 NAME UMa Region reg 11 00 +50.0           ~ 333 0
3 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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