期刊
ASTROPARTICLE PHYSICS
卷 35, 期 7, 页码 435-448出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.astropartphys.2011.11.007
关键词
Gamma-ray astronomy; Cherenkov telescopes; Crab Nebula
资金
- German BMBF
- MPG
- Italian INFN
- Swiss National Fund SNF
- Spanish MICINN
- Marie Curie program
- Spanish Consolider-Ingenio programme [CSD2007-00042, CSD2009-00064]
- Bulgarian NSF [DO02-353]
- Academy of Finland [127740]
- YIP of the Helmholtz Gemeinschaft
- DFG Collaborative Research Centers [SFB823/C4, SFB876/C3]
- Polish MNiSzW [745/N-HESS-MAGIC/2010/0]
- ICREA Funding Source: Custom
- Grants-in-Aid for Scientific Research [22840030] Funding Source: KAKEN
MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma. Since autumn 2009 both telescopes have been working together in stereoscopic mode, providing a significant improvement with respect to the previous single-telescope observations. We use observations of the Crab Nebula taken at low zenith angles to assess the performance of the MAGIC stereo system. The trigger threshold of the MAGIC telescopes is 50 - 60 GeV. Advanced stereo analysis techniques allow MAGIC to achieve a sensitivity as good as (0.76 +/- 0.03)% of the Crab Nebula flux in 50 h of observations above 290 GeV. The angular resolution at those energies is better than similar to 0.07 degrees. We also perform a detailed study of possible systematic effects which may influence the analysis of the data taken with the MAGIC telescopes. (C) 2011 Elsevier B.V. All rights reserved.
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