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Correction of Background Effect in Photographic Photometry

K. Purbosiswojo,

Data & Software Engineering Research Group
STEI-ITB, Jl. Ganeca No.10, Bandung 40132, Indonesia

Abstract. A method to correct photographic magnitudes of stars embedded in nebulosities measured by making use of Eichner-photometers is presented. An application of the method was carried out on the Galactic Cluster NGC 6530 for the photometer of Warner and Swasey Observatory. The method is also applicable on parts of photographic plates which background-emulsion densities differ from that of the region of the standard sequence


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