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1985OSUROpubl.....Dixon+

Atlas of sky overlay maps for the Palomar Sky Syrvey

second edition
by R. S. Dixon , M. R. Gearhart, C. Schmidtke
publ. by OSURO, 1985
Background
The series of astronomical photograghs know as the National Geigraphic Society-Palomar Observatory Sky Atlas (PSS) has became one of the most widely osed basic references in radio astronomy. Ose of the PSS, for optical identification of objects didcovered at other than optical wavelengths (radio, X-rays, infrared, etc.) has became so widespread that the term "optical identification" is almost synonymous with inspecting the PSS at the position of the object. The PSS has also been used as source material for numerous surveys of objects of almost every type.
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History of the overlay maps
The staff of the OSURO has been doing optical identification of radio sources using the PSS for many years.
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In the early seventies, we began preparation of the Master List of Non-Stellar Objects, a neccesary prelude to the ovetlay map project. This was recently published by Dixon and Sonneborg (1980). This reference work is an amalgation of all 270 previously published catalogs of non-stellar objects of all types, including galaxies clusters of galaxies and others. This reference work is commonly referred to by the acronym MOL (Master Optical List, to distinguish from Master List of Radio Sources also prepared in OSURO.
In catalog there are: