منابع مشابه
8.24 Lidar to Support Ground-Based Astronomy
1. RESEARCH INSTRUMENTATION AND NEEDS Astronomers using ground-based telescopes are necessarily engaged in negating the effects of the earth’s atmosphere, which acts as a wavelength dependent, spatially and temporally non-stationary refractive optical element in any ground based telescope system. Almost all of the extinction of starlight due to aerosols happens in the troposphere. These troposp...
متن کامل1 . 5 Lidar System to Support Ground - Based Astronomy
All ground-based astronomical observational data include effects of the Earth’s atmosphere, which is a wavelength dependent, spatially and temporally non-stationary optical medium. The atmosphere creates two different physical types of observational effects: it absorbs and scatters light in a wavelength dependent manner, and it blurs images by turbulence-induced refractive wave front perturbati...
متن کاملGround based gamma-ray astronomy with Cherenkov Telescopes
Very-high-energy (>100 GeV) γ-ray astronomy is emerging as an important discipline in both high energy astrophysics and astro-particle physics. This field is currently dominated by Imaging Atmospheric-Cherenkov Telescopes (IACTs) and arrays of these telescopes. Such arrays have achieved the best angular resolution and energy flux sensitivity in the γ-ray domain and are still far from the fundam...
متن کاملRitchey - Chrétien telescope for ground - based γ - ray astronomy
The field of very high energy (VHE) ground-based γray astronomy, pioneered by the Whipple 10m atmospheric Cherenkov telescope (ACT) [ 1], is being revolutionized by the new generation observatories: H.E.S.S. [ 2], MAGIC [ 3], and VERITAS [ 4]. Dozens of new γray sources, some representing new classes of VHE emitters, have been discovered during the last decade [ 5]. If the trend of scientific d...
متن کاملFuture Directions in Ground-Based Gamma-Ray Astronomy
With the recent successes of gamma-ray astronomy an obvious question is raised: where is this field going next? At present we have a network of similar air Cerenkov telescope arrays throughout the world and a large water detector in the USA. Here we try to identify which practical paths exist to newer, more sensitive instruments and what these might hold for the future.
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ژورنال
عنوان ژورنال: Science
سال: 1964
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.146.3649.1255