Search for Correlated High Energy Cosmic Ray Events With CHICOS

Authors

B. E. Carlson, California Institue of Technology
E. Brobeck, California Institue of Technology
C. J. Jillings, California Institue of Technology
Michelle B. Larson, California Institute of Technology
T. W. Lynn, California Institue of Technology
R. D. McKeown, California Institue of Technology
James E. Hill, California State University, Dominguez Hills
B. J. Falkowski, California State University, Northridge
R. Seki, California State University, Northridge
J. Sepikas, Pasadena City College
G. B. Yodh, University of California, Irvine

Document Type

Article

Journal/Book Title/Conference

Journal of Physics G: Nuclear and Particle Phyics

Volume

31

Issue

5

Publisher

Institute of Physics

Publication Date

3-24-2005

First Page

409

Last Page

416

Abstract

We present the results of a search for time correlations in high energy cosmic ray data (primary E > 10¹⁴eV) collected by the California High school Cosmic ray ObServatory (CHICOS) array. Data from 60 detector sites spread over an area of 400 km² were studied for evidence of isolated events separated by more than 1 km with coincidence times ranging from 1 µs up to 1 s. The results are consistent with the absence of excess coincidences except for a 2.9σ excess observed for coincidence times less than 10 µs. We report upper limits for the coincidence probability as a function of coincidence time.

Comments

Originally published by the Institute of Physics. Publisher's PDF available through remote link.

Recommended Citation

Carlson, B. E.; Brobeck, E.; Jillings, C. J.; Larson, Michelle B.; Lynn, T. W.; McKeown, R. D.; Hill, James E.; Falkowski, B. J.; Seki, R.; Sepikas, J.; and Yodh, G. B., "Search for Correlated High Energy Cosmic Ray Events With CHICOS" (2005). All Physics Faculty Publications. Paper 6.
https://digitalcommons.usu.edu/physics_facpub/6

https://doi.org/10.1088/0954-3899/31/5/011