%0 Journal Article
%T Surveys with the Cherenkov Telescope Array
%+ Institut de Planétologie et d'Astrophysique de Grenoble (IPAG )
%+ Universidad Complutense de Madrid =  Complutense University of Madrid  [Madrid] (UCM)
%+ SLAC National Accelerator Laboratory (SLAC)
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%+ Department of Physics and Astronomy [Leicester]
%+ Institut de recherche en astrophysique et planétologie (IRAP)
%+ Laboratoire Leprince-Ringuet (LLR)
%A Dubus, G
%A Contreras, J, L
%A Funk, S
%A Gallant, Y
%A Hassan, T
%A Hinton, J
%A Inoue, Y
%A Knödlseder, Jürgen
%A Martin, P
%A Mirabal, N
%A de Naurois, M, L
%A Renaud, Matthieu
%< avec comité de lecture
%@ 0927-6505
%J Astroparticle Physics
%I Elsevier
%V 43
%P 317 - 330
%8 2013
%D 2013
%Z 1208.5686
%R 10.1016/j.astropartphys.2012.05.020
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles
%X Surveys open up unbiased discovery space and generate legacy datasets of long-lasting value. One of the goals of imaging arrays of Cherenkov telescopes like CTA is to survey areas of the sky for faint very high energy gamma-ray (VHE) sources, especially sources that would not have drawn attention were it not for their VHE emission (e.g . the Galactic “dark accelerators”). More than half the currently known VHE sources are to be found in the Galactic Plane. Using standard techniques, CTA can carry out a survey of the region |l|<60° |b|<2° in 250 h (1/4th the available time per year at one location) down to a uniform sensitivity of 3 mCrab (a “Galactic Plane survey”). CTA could also survey 1/4th of the sky down to a sensitivity of 20 mCrab in 370 h of observing time (an “all-sky survey”), which complements well the surveys by the Fermi/LAT at lower energies and extended air shower arrays at higher energies. Observations in (non-standard) divergent pointing mode may shorten the “all-sky survey” time to about 100 h with no loss in survey sensitivity. We present the scientific rationale for these surveys, their place in the multi-wavelength context, their possible impact and their feasibility. We find that the Galactic Plane survey has the potential to detect hundreds of sources. Implementing such a survey should be a major goal of CTA. Additionally, about a dozen blazars, or counterparts to Fermi/LAT sources, are expected to be detected by the all-sky survey, whose prime motivation is the search for extragalactic “dark accelerators”.
%G English
%2 https://hal.science/hal-01381963/document
%2 https://hal.science/hal-01381963/file/1-s2.0-S0927650512001259-main.pdf
%L hal-01381963
%U https://hal.science/hal-01381963
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