Optical positions for identifications from the MC2 and MC3 catalogues

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astrometry, Astronomical Catalogs, Optical Measurement, Position (Location), Radio Sources (Astronomy), Position Errors, Root-Mean-Square Errors, Sky Surveys (Astronomy), Tables (Data)

Scientific paper

Optical positions measured from the Palomar Sky Survey prints are given for objects identified with MC2 and MC3 radio sources. A comparison with other published optical positions for sources in common suggests an rms error of 0.3 - 0.35 arcsec in each coordinate. Comparison of previously published optical positions from the Sydney measuring machine with subsequent more accurate radio positions indicates an rms error of 0.28 arcsec in each coordinate for the optical positions of stellar objects.

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