Abstract
PHOTOGRAPHY OF THE ASTRONOMISCHE GESELL-SCHAFT ZONES.-Prof. Schlesinger gave an interesting account at the meeting of the Royal Astronomical Society on Jan. 10 of the reobservation by photography, at Allegheny Observatory, of some of these zones. The novelty of the method lies in the size of the plates used, some of which are 5° in the side, others I2|°. The lens is a triple one, and the only form of distortion present is a tendency for bright stars to appear slightly displaced away from the centre as compared with faint ones; the amount near the edge is 0.06 per magnitude. As each star is present on at least two plates, with the shift generally in opposite directions, no systematic magnitude error is introduced.
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Our Astronomical Column. Nature 115, 243 (1925). https://doi.org/10.1038/115243a0
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DOI: https://doi.org/10.1038/115243a0