Automated quasar detection

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Abstract
The new technique of automated quasar detection (AQD) is described. It is essentially computer software which runs on STARLINK and selects quasars according to specified selection criteria from COSMOS mapping mode data of, in this case, an objective-prism plate from the UK Schmidt telescope. With AQD the selection effects are known, pre-defined and rigidly maintained and large, complete samples may be obtained from many plates. The success of AQD is demonstrated by comparison with a strip of 3.95 × 0.99 deg2 which had already been thoroughly searched by eye. The surface density of quasar candidates in that area was substantially increased.

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