Observational results on quasar alignments in five fields

Details Observational results on quasar alignments in five fields Observational results on quasar alignments in five fields

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..374c&link_type=abstract

IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr

Astronomy and Astrophysics

Astrophysics

3

Astrometry, Astronomical Coordinates, Quasars, Position Errors, Statistical Tests

Scientific paper

The results of an objective search for aligned quasar triplets in five fields are reported. Each field is approximately 25 square degrees in area and contains approximately 200 quasar candidates. UK Schmidt plates of each field were measured on the Royal Observatory, Edinburgh, Cosmos machine. The obtained positions were transformed to the celestial sphere by fitting a third order polynomial in (x,y) to a grid of approximately 100 standard stars. It is pointed out that the final quasar positions are good to approximately 1 arc-second. In each field alignments were detected by taking the quasars in pairs and seeking a third quasar.

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