Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-02
Astropart.Phys.31:1-5,2009
Astronomy and Astrophysics
Astrophysics
12 pages, 5 figures, accepted for publication in Astroparticle Physics
Scientific paper
10.1016/j.astropartphys.2008.10.
Contemporary imaging air Cherenkov telescopes (IACT) for ground-based very high energy (VHE) gamma ray astronomy have prime focus optical design. Typically these telescopes have a 2-4 deg wide field of view (FoV). They use f/0.7-f/1.2 optics and provide 3-10 arcmin resolution in the FoV. Generally, a well designed telescope that includes more than one optical element will offer some advantages not available in prime focus designs, such as a wider FoV, a more compact size, a higher and more homogeneous resolution and a lower degree of isochronous distortion of light rays focused onto the focal plane. Also, they allow monitoring the gamma ray activity in a sizeable portion of the sky in a single observation. This would allow one to perform a sensitive all-sky survey in a relative short time. We present an f/0.8 15 deg wide FoV telescope design, which provides a high and near uniform resolution and low isochronous distortion across the entire FoV.
Andersen Michael I.
Mirzoyan Rafayel
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