نتایج جستجو برای: astronomical instrument
تعداد نتایج: 91251 فیلتر نتایج به سال:
This contribution revolves about computer models of astronomical instruments and their application in advanced calibration strategies and observation model based data analysis. The historical connection between calibration and data analysis is reviewed. The success of physical models in the analysis of observational data with strong instrumental signatures is shown, and a concept for model base...
The mission of CARA, the Center for Astrophysical Research in Antarctica, is to explore and exploit the unique conditions at the geographic South Pole and to lay the foundation for an ongoing national observatory. A small prototype user-facility instrument has demonstrated that very sensitive imaging in the thermal infrared can be routinely performed at the South Pole. The site should be furthe...
I propose to use as a window the dark core of an optical vortex to examine a weak background signal hidden in the glare of a bright coherent source. Applications such as the detection of an astronomical object, forward-scattered radiation, and incoherent light are described whereby signal enhancements of at least 7 orders of magnitude may be achieved.
We report measurements of eeects of 2.1 MeV and 40 MeV protons on Charge Coupled Device X-ray detectors of a type soon to be launched on several astronomical research satellites. We discuss ground performance characterization techniques and compare our measurements to simple models of the detector damage mechanism. We predict detector peformance degradation rates in low-earth orbit. We plan to ...
Large format ultraviolet image sensors have been and are actively being developed for a variety of space borne astronomy missions The detector is historically one of the most problematic parts of any astronomical spacecraft and it plays a critical role in the overall capability of the instrument There are numerous detector systems with none being ideal for all applications This paper focuses on...
Large gravitational wave interferometric detectors, like Virgo and LIGO, demonstrated the capability to reach their design sensitivity, but to transform these machines into an effective observational instrument for gravitational wave astronomy a large improvement in sensitivity is required. Advanced detectors in the near future and third-generation observatories in more than one decade will ope...
The antarctic plateau has the potential for being the best site on Earth for conducting astronomical observations from the near-infrared to the sub-millimeter. Particular gains are expected in the 1 to 5 micron region, where the high altitude, low water vapour content, and low thermal emission from the atmosphere combine to create observing conditions unequalled elsewhere on the surface of the ...
The proposed Low Frequency Array will be a powerful new radio telescope operating in the 15 to 240 MHz range. LOFAR will be a fully digital instrument with tens of thousands of antennas and receivers. In the currently proposed configuration LOFAR will also be capable of operating as a high performance passive radar system using FM radio stations as signals of opportunity. In this mode of operat...
A demonstration at iGRID 2005 used dynamic, deterministic, and dedicated LightPath network services to link radio telescopes from around the world with computational facilities at the MIT Haystack Observatory to create a single coherent instrument for real-time astronomical and geodetic research. The “electronic Very Long Baseline Interferometry” (e-VLBI) application provides ultra-high resolut...
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