Authors
Citation
Y. Katayose et al., A SEARCH FOR NONRANDOM COSMIC-RAY TIME-SERIES BY A CLUSTER-ANALYSIS, Nuovo cimento della Societa italiana di fisica. C, Geophysics and space physics, 21(3), 1998, pp. 299-316
Citations number
20
Categorie Soggetti
Geochemitry & Geophysics","Astronomy & Astrophysics
Journal title
Nuovo cimento della Societa italiana di fisica. C, Geophysics and space physics
ISSN journal
11241896
→ ACNP
Volume
21
Issue
3
Year of publication
1998
Pages
299 - 316
Database
ISI
SICI code
1124-1896(1998)21:3<299:ASFNCT>2.0.ZU;2-W
Abstract
Non-random time series of cosmic rays were searched for in air shower
data of mean energy 1.1 x 10(15) ey collected by the air shower array
at Mitsuishi, Japan, during the period from January 1989 to October 19
96. By clustering the arrival time of air showers, five occasions of r
ate elevation phenomena were found with an expected probability less t
han or equal to 0.05 (varying from 0.18 x 10(-2) to 4.0 x 10(-2)) from
a random distribution in 3651358 air showers. The arrival directions
of these events are grouped in two regions on the galactic plane withi
n the latitude +/-25 degrees, corresponding to a chance probability of
1.6% from a uniform distribution.