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The Faint Images of the Radio Sky at Twenty cm (FIRST) Survey catalog contains radio source detections from observations between 1993 and 2011. It covers approximately 10,575 square degrees of the north and south Galactic caps, with a typical detection limit of 1 milliJansky. This 14Dec17 version is provided by the National Aeronautics and Space Administration and includes refinements for improved flux accuracy and source reliability.
License is listed as 'other-license-specified'; specific terms must be reviewed. File formats include BIN and HTML.