Recognition of objects and position recovery from microdensitometer measurements of large field plates |
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| Authors: | G Caprioli D Nanni A Palma A Vignato |
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| Institution: | (1) Osservatorio Astronomico di Roma, Italia;(2) Osservatorio Astronomico di Roma and Istituto di Fisica dell'Universita di Roma, Italia |
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| Abstract: | The Coma region on a glass copy of the Palomar Sky Survey has been scanned by the PDS microdensitometer at the Napoli Observatory. A method is described for obtaining the photometric parameters and positions of the images: 12 316 objects have been found. The repositioning of the scanner over the computed coordinates is satisfatory. AGK3 stars were considered to evaluate the plate constants and the precision. Comparison with Dressel and Condon's positions of galaxies gives a r.m.s. scatter consistent with the internal error of the published list. |
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