Results 261 to 270 of about 210,357 (290)
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Space Science Reviews, 2009
A retrospective is given on infrared sky surveys from Thomas Edison’s proposal in the late 1870s to IRAS, the first sensitive mid- to far-infrared all-sky survey, and the mid-1990s experiments that filled in the IRAS deficiencies. The emerging technology for space-based surveys is highlighted, as is the prominent role the US Defense Department ...
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A retrospective is given on infrared sky surveys from Thomas Edison’s proposal in the late 1870s to IRAS, the first sensitive mid- to far-infrared all-sky survey, and the mid-1990s experiments that filled in the IRAS deficiencies. The emerging technology for space-based surveys is highlighted, as is the prominent role the US Defense Department ...
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Symposium - International Astronomical Union, 1998
Photographic surveys have played a vital role in virtually every area of astronomical research over the last 50 years. Indeed, one can make a strong case that Schmidt telescopes in general, and the Palomar 48-inch Schmidt in particular, have made the most substantial contribution to our understanding of the Universe—at least at optical wavelengths. The
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Photographic surveys have played a vital role in virtually every area of astronomical research over the last 50 years. Indeed, one can make a strong case that Schmidt telescopes in general, and the Palomar 48-inch Schmidt in particular, have made the most substantial contribution to our understanding of the Universe—at least at optical wavelengths. The
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Symposium - International Astronomical Union, 2005
Far-infrared (FIR), ultraviolet (UV), and soft X-ray observations are easily degraded by dust and gas between the source and the telescope. They must be made from space, where they are still affected by the interstellar medium (ISM) of our Galaxy. Fortunately the ISM is quite patchy, with several “cosmic windows” covering ∼ 100 deg2 of sky having ...
J. J. Condon +9 more
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Far-infrared (FIR), ultraviolet (UV), and soft X-ray observations are easily degraded by dust and gas between the source and the telescope. They must be made from space, where they are still affected by the interstellar medium (ISM) of our Galaxy. Fortunately the ISM is quite patchy, with several “cosmic windows” covering ∼ 100 deg2 of sky having ...
J. J. Condon +9 more
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1997
Photographic surveys have played a vital role in virtually every area of astronomical research over the last 50 years. Indeed, one can make a strong case that Schmidt telescopes in general, and the Palomar 48-inch Schmidt in particular, have made the most substantial contribution to our understanding of the Universe—at least at optical wavelengths. The
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Photographic surveys have played a vital role in virtually every area of astronomical research over the last 50 years. Indeed, one can make a strong case that Schmidt telescopes in general, and the Palomar 48-inch Schmidt in particular, have made the most substantial contribution to our understanding of the Universe—at least at optical wavelengths. The
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Publications of the Astronomical Society of the Pacific, 1995
Cameras containing arrays of charge-coupled devides--or which are otherwise capable of sustained high data rates--enable optical sky surveys that compete in efficiency with photographic surveys in terms of area of sky covered per unit observing time.
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Cameras containing arrays of charge-coupled devides--or which are otherwise capable of sustained high data rates--enable optical sky surveys that compete in efficiency with photographic surveys in terms of area of sky covered per unit observing time.
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Astrophysics and Space Science, 1994
The Sloan Digital Sky Survey is a project which will produce a detailed digital phometric map of half the northern sky to about 23 magnitude using a special purpose wide field telescope of 2.5 meter aperture. This map will be used to select about a million galaxies and 100,000 quasars, for which high resolution spectra will be obtained using the same ...
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The Sloan Digital Sky Survey is a project which will produce a detailed digital phometric map of half the northern sky to about 23 magnitude using a special purpose wide field telescope of 2.5 meter aperture. This map will be used to select about a million galaxies and 100,000 quasars, for which high resolution spectra will be obtained using the same ...
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1999
One of the essential data bases in radio astronomy are the all-sky surveys. These have been traditionally made by combining some northern survey with a southern one, often made with different instruments at some nearby frequency. The combinations led to many calibration problems since beams and observing methods were often not identical. For successful
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One of the essential data bases in radio astronomy are the all-sky surveys. These have been traditionally made by combining some northern survey with a southern one, often made with different instruments at some nearby frequency. The combinations led to many calibration problems since beams and observing methods were often not identical. For successful
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The infrared sky - A survey of surveys
Publications of the Astronomical Society of the Pacific, 1988A subjective review is given of the major milestones in infrared astronomy. Emphasis is placed on the survey efforts between 2 and 120 μm, the realm of the extrinsic photodetector. The historical developments in infrared astronomy and the pioneering, often marginally successful, survey attempts are put in the perspective of improving technology.
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The challenge of blending in large sky surveys
Nature Reviews Physics, 2021Peter Melchior +2 more
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