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Search for Point Sources of Ultra–High‐Energy Cosmic Rays above 4.0 x 1019eV Using a Maximum Likelihood Ratio Test
- Source :
- The Astrophysical Journal. 623:164-170
- Publication Year :
- 2005
- Publisher :
- American Astronomical Society, 2005.
-
Abstract
- We present the results of a search for cosmic ray point sources at energies above 40 EeV in the combined data sets recorded by the AGASA and HiRes stereo experiments. The analysis is based on a maximum likelihood ratio test using the probability density function for each event rather than requiring an a priori choice of a fixed angular bin size. No statistically significant clustering of events consistent with a point source is found.
- Subjects :
- Physics
010308 nuclear & particles physics
Point source
Astrophysics::High Energy Astrophysical Phenomena
Ratio test
Astronomy and Astrophysics
Probability density function
Cosmic ray
Astrophysics
01 natural sciences
Bin
Space and Planetary Science
0103 physical sciences
Ultra-high-energy cosmic ray
Cluster analysis
010303 astronomy & astrophysics
Event (probability theory)
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 623
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi...........11a39deff2a24b8f8e9cc81d6aec1141