General map or image of a region of the sky with no specific observational target
Composite image of the GOODS-South field, result of a deep survey using two of the four giant 8.2-metre telescopes composing ESO's Very Large TelescopeGamma-ray pulsars detected by the Fermi Gamma-ray Space Telescope
An astronomical survey is a general map or image of a region of the sky (or of the whole sky) that lacks a specific observational target. Alternatively, an astronomical survey may comprise a set of images, spectra, or other observations of objects that share a common type or feature. Surveys are often restricted to one band of the electromagnetic spectrum due to instrumental limitations, although multiwavelength surveys can be made by using multiple detectors, each sensitive to a different bandwidth.[1]
Surveys have generally been performed as part of the production of an astronomical catalog. They may also search for transient astronomical events. They often use wide-field astrographs.
^See, for example, Lacy M, Riley JM, Waldram EM, McMahon RG, Warner PJ (1995). "A radio-optical survey of the North Ecliptic CAP". Monthly Notices of the Royal Astronomical Society. 276 (2): 614–626. Bibcode:1995MNRAS.276..614L. doi:10.1093/mnras/276.2.614.
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An astronomicalsurvey is a general map or image of a region of the sky (or of the whole sky) that lacks a specific observational target. Alternatively...
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