Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-12-26
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
7 pages, 3 figures, proceedings of AGN Physics in the CTA Era, Toulouse, France (2011), to be published in PoS
Scientific paper
Following the great success of the current Imaging Atmospheric Cherenkov Telescopes, the next generation gamma-ray telescope arrays, Cherenkov Telescope Array (CTA), is being prepared. CTA will have an order of magnitude higher sensitivity and wider energy range than current instruments. Large samples of very high energy (VHE; >30 GeV) sources will be obtained with CTA. Here we discuss potential AGN population studies for the CTA era concerning the overall source counts and the statistics of high redshift sources. Based on our latest blazar gamma-ray luminosity function (GLF) model, we find that CTA will detect ~50 and ~160 blazars with 1 year and 10 years of blank field sky survey, respectively. CTA is also expected to find a blazar at z~1.4 (~20 blazars above z=1) based on the blazar GLF. Furthermore, we also examine the detectability of high redshift Fermi blazars. By extrapolating the Fermi blazars' spectra with a power-law, we find that CTA has a capability to detect a Fermi blazar at z=2.49.
CTA Consortium for the
Inoue Yoshiyuki
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