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Ultra High Energy Cosmic Rays in the north: Some results from the High Resolution Fly's Eye
Matthews, J. N.
通讯作者Matthews, J. N.
会议名称2nd Conference on Colliders to Cosmic Rays
会议日期FEB 25-MAR 01, 2007
会议地点Lake Tahoe, CA
英文摘要

The High Resolution Fly's Eye (HiRes) observatory collected Ultra High Energy Cosmic Ray (UHECR) data between 5/1997 and 4/2006. The experiment observed cosmic ray air showers via the air fluorescence technique and consisted of two observatory sites separated by 12.6 km in the western Utah desert. The two stations each measured the cosmic ray showers in monocular mode, however, the data from the two stations can also be combined to form a stereo measurement of the air showers. The experiment measures such properties as the energy spectrum, chemical composition, and p-air cross-section of these cosmic rays. It also searches for point sources and other anisotropy. The spectrum is measured above similar to 3 x 10(17) eV and shows significant structure including the "ankle" and a steep fall off which is consistent with the expectation of the GZK threshold. [1, 2] The spectrum is inconsistent with a continuing spectrum at the 5 sigma level. The composition is measured using the X-max technique. It was found to be predominantly light and unchanging above 10(18) eV. Finally, several different styles of searches for anisotropy in the data were performed. There are tantalizing hints including potential correlation with BL Lac objects and the "AGASA triplet", however these will need to be confirmed with an independent data set. Many members from HiRes have now joined a contingent from the old AGASA collaboration and the new group - The Telescope Array (TA) Project - will merge the techniques of its two predecessors. TA data collection begins mid-2007.


英文关键词UHECR cosmic ray fluorescence GZK spectrum
来源出版物C2CR07: Colliders to Cosmic Rays
ISSN0094-243X
出版年2007
卷号928
页码47-54
ISBN978-0-7354-0438-0
出版者AMER INST PHYSICS
类型Proceedings Paper
语种英语
国家USA
收录类别CPCI-S
WOS记录号WOS:000250106600006
WOS关键词SPECTRUM ; SEARCH
WOS类目Physics, Multidisciplinary ; Physics, Particles & Fields
WOS研究方向Physics
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/296408
作者单位(1)Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA
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Matthews, J. N.. Ultra High Energy Cosmic Rays in the north: Some results from the High Resolution Fly's Eye[C]:AMER INST PHYSICS,2007:47-54.
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