期刊
ADVANCES IN SPACE RESEARCH
卷 53, 期 10, 页码 1483-1491出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2013.09.020
关键词
VHE gamma rays; Cosmic rays; Galactic sources; Atmospheric Cherenkov telescopes; VERITAS
类别
资金
- U.S. Department of Energy Office of Science,
- U.S. National Science Foundation and the Smithsonian Institution
- NSERC in Canada
- Science Foundation Ireland(SFI) [10/RFP/AST2748]
- STFC in the U.K
- Science Foundation Ireland (SFI) [10/RFP/AST2748] Funding Source: Science Foundation Ireland (SFI)
- Direct For Mathematical & Physical Scien [1307171] Funding Source: National Science Foundation
- Division Of Physics [1307171] Funding Source: National Science Foundation
VERITAS is a major ground-based detector of very high energy (VHE, E> 100 GeV) gamma rays and cosmic rays. VERITAS consists of an array of four 12 m-diameter atmospheric Cherenkov telescopes that has been fully operational since September 2007. VERITAS has detected many astrophysical sources of VHE gamma rays, including at least 17 VHE sources that are likely Galactic in origin. This paper describes some of the Galactic source highlights from VERITAS with an emphasis on those aspects that relate to the origin of cosmic rays. Specifically, topics include the VERITAS discovery of VHE emission from the Tycho and CTA 1 supernova remnants, the identification of HESS J0632+057 as a new VHE binary, a substantially improved view of the gamma-ray emission in the Cygnus OB1 region, and the recent remarkable discovery of VHE emission from the Crab pulsar. In 2009, VERITAS was upgraded by relocation of one of the telescopes, leading to a significant improvement in sensitivity. A program to further improve the performance of VERITAS, involving the upgrade of the telescope trigger systems and the telescope cameras, was completed in summer 2012. The upgrade has led to an improved sensitivity and a lower energy threshold for VERITAS, allowing it to perform deeper observations of known Galactic and extragalactic sources and to detect fainter and more distant sources. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
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