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1985A&A...145..405O 
ADS Astronomy Abstract Service

Title:              A very deep Westerbork survey of a field previously
		    observed with the VLA
Authors:            OORT, M. J. A.; WINDHORST, R. A.
Affiliation:        AA(Leiden, Rijksuniversiteit, Sterrewacht, Leiden,
		    Netherlands) AB(Mount Wilson and Los Campanas
		    Observatories, Pasadena, CA)
Journal:            Astronomy and Astrophysics (ISSN 0004-6361), vol. 145,
		    no. 2, April 1985, p. 405-424. Sponsorship:
		    Nederlandse Organisatie voor Zuiver-Wetenschappelijk
		    Onderzoek.
Publication Date:   04/1985
Category:           Astronomy
Origin:             STI
NASA/STI Keywords:  RADIO INTERFEROMETERS, RADIO SOURCES (ASTRONOMY),
		    ASTRONOMICAL MAPS, CENTIMETER WAVES, DATA REDUCTION,
		    GRAY SCALE, POSITION (LOCATION), TABLES (DATA)
Bibliographic Code: 1985A&A...145..405O

Abstract

A deep 21 cm radio survey of the Lynx 2 field selected from the Leiden-Berkeley Deep Survey areas is presented. The observations, data reduction, and the source sample and its completeness are described, and the source counts are presented. The angular size statistics are discussed, and the present observations are compared with earlier VLA observations of the same area and a comparable sensitivity. A systematic position difference as a function of distance to the field center is found that probably results from uncertainties in the map to sky coordinate conversion for VLA positions at large distances from the field center. The absolute uncertainties in the coordinate frame and flux scale are determined, as well as the signal-to-noise dependent error distribution. A number of possible variable sources in the map are presented.