An astronomical survey is a general map or image of a region of the sky which lacks a specific observational target. Alternatively, an astronomical survey may comprise a set of many images or spectra of objects which 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. Surveys have generally been performed as part of the production of an astronomical catalogue.
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Famous quotes containing the word survey:
“When I survey the wondrous cross
On which the Prince of Glory died,
My richest gain I count but loss,
And pour contempt on all my pride.”
—Isaac Watts (1674–1748)