A NORTHERN SKY SURVEY FOR POINT-LIKE SOURCES OF EeV NEUTRAL PARTICLES WITH THE TELESCOPE ARRAY EXPERIMENT

Title
A NORTHERN SKY SURVEY FOR POINT-LIKE SOURCES OF EeV NEUTRAL PARTICLES WITH THE TELESCOPE ARRAY EXPERIMENT
Authors
김항배
Keywords
acceleration of particles; cosmic rays; surveys
Issue Date
2015-05
Publisher
IOP PUBLISHING LTD
Citation
ASTROPHYSICAL JOURNAL, v. 804, no. 2, Page. 133-133
Abstract
We report on the search for steady point-like sources of neutral particles around 10(18) eV between 2008 and 2013 May with the scintillator SD of the Telescope Array experiment. We found overall no significant point-like excess above 0.5 EeV in the northern sky. Subsequently, we also searched for coincidence with the Fermi bright Galactic sources. No significant coincidence was found within the statistical uncertainty. Hence, we set an upper limit on the neutron flux that corresponds to an averaged flux of 0.07 km(-2) yr(-1) for E ˃ 1 EeV in the northern sky at the 95% confidence level. This is the most stringent flux upper limit in a northern sky survey assuming point-like sources. The upper limit at the 95% confidence level on the neutron flux from Cygnus X-3 is also set to 0.2 km(-2) yr(-1) for E ˃ 0.5 EeV. This is an order of magnitude lower than previous flux measurements.
URI
http://iopscience.iop.org/article/10.1088/0004-637X/804/2/133/meta;jsessionid=4E3639B027FB636B54FF29C9E3EEDFE4.c1.iopscience.cld.iop.orghttp://hdl.handle.net/20.500.11754/24719
ISSN
0004-637X; 1538-4357
DOI
http://dx.doi.org/10.1088/0004-637X/804/2/133
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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