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Aims: We seek to provide 2MASS and OGLE identifications and coordinates forall stars in the finding chart published by Arp\,(1965). This chart covers thelow extinction area around NGC 6522, also known as Baade's window, atcoordinates (l,b)=(1.02,-3.92).  Methods: A cross correlation, using numerical techniques, was performedbetween a scan of the original finding chart from Arp (1965) and 2MASS andOGLE-II images and stellar coordinates.  Results: We provide coordinates for all stars in Arp's finding chart and2MASS and OGLE identifications wherever possible. Two identifications inquadrant II do not appear in the original finding chart.

Coordinates and 2MASS and OGLE identifications for all stars in Arp's 1965 finding chart for Baade's Window