Mathematics – Logic
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4705s&link_type=abstract
American Astronomical Society, HEAD meeting #11, #47.05; Bulletin of the American Astronomical Society, Vol. 41, p.739
Mathematics
Logic
Scientific paper
The Cherenkov Telescope Array CTA is proposed as a next-generation open observatory for very high energy gamma rays (E>10 GeV). CTA will consist of arrays of Cherenkov telescopes, aiming to (a) increase sensitivity by another order of magnitude, (b) extend the energy range by an order of magnitude and thus provide wide and uniform energy coverage from a couple of tens of GeV to beyond 100 TeV in photon energy, (c) increase the angular resolution and hence the ability to resolve the morphology of sources, (d) significantly boost the detection area and hence the detection rates, of particular importance for transient phenomena and at the highest energies, and (e) enhance the all sky survey capability, the monitoring capability and the flexibility of operation. Low-energy coverage is crucial both for the study of Galactic sources such as pulsars, and of sources at cosmological distances, where high-energy gamma rays are attenuated in interactions with background light. The high energy coverage allows probing the cut-off regions of Galactic particle accelerators, crucial for the understanding of acceleration mechanisms. CTA will be operated as a proposal-driven observatory, with a Science Data Centre providing access to data, analysis tools and user training.
CTA will achieve its performance by combining different telescope sub-arrays: a few very large telescopes optimised for detection of low-energy showers will be surrounded by a core array of some tens of 10-12 m class telescopes, covering about 1 km2 and providing optimal in the 100 GeV to 10 TeV domain. A halo array of sparsely distributed 10 m class telescopes or of a larger number of smaller telescopes allows for the even larger detection areas required for the rate-limited regime beyond 10 TeV.
In the talk an overview of the physics potential of CTA and the status of the project will be given.
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