An analysis of coordinate transformation in Schmidt telescope photographic plates
Abstract
Concentric projection theory and an adjustment by means of thirddegree polynomials are used to analyze the transformations relating celestial equatorial coordinates to rectangular coordinates, measured on a plate obtained by means of a Schmidt telescope lacking an objective prism. The results obtained show the presence of distortions probably due to photographic emulsion random defects. Systematic defects in the reference catalog, and/or anomalous atmospheric refraction and filter effects. It is found that the mean radiation detected in the actual position of any stellar image reaches a value of 0.64 arcsec within a circular plate zone of approximately one deg radius.
 Publication:

Revista Mexicana de Astronomia y Astrofisica, vol. 6
 Pub Date:
 December 1981
 Bibcode:
 1981RMxAA...6..129P
 Keywords:

 Astrometry;
 Astronomical Coordinates;
 Astronomical Photography;
 Coordinate Transformations;
 Schmidt Telescopes;
 Star Distribution;
 Cartesian Coordinates;
 Error Analysis;
 Photographic Measurement;
 Polynomials;
 Position Errors;
 Projective Geometry;
 Reference Stars;
 Astronomy