期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2012/11/008
关键词
dark matter detectors; gamma ray detectors; dark matter experiments; gamma ray experiments
资金
- Department of Energy Office of Science
- Alfred P. Sloan Foundation
- NSF [1066293]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1066293] Funding Source: National Science Foundation
We study the instrumental features of photons front the peak observed at E-gamma = 130 GeV in the spectrum of Fermi-LAT data. We use the sPLoTs algorithm to reconstruct - seperately for the photons in the peak and for background photons - the distributions of quantities such as incident angles, the recorded time, features of the spacecraft position, the zenith angles, the conversion type and details of the energy and direction reconstruction. The presence of a striking feature or cluster in such a variable would suggest an instrumental cause for the peak. In the publically available data, we find several suggestive features which may inform further studies by instrumental experts, though the size of the signal sample is too small to draw statistically significant conclusions.
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