Digitized First Byurakan Survey (DFBS) Plate Scans

First Byurakan survey plate scan service
ICRS Position, RA,DEC, or Simbad object (e.g., 234.234,-32.45)
Size in decimal degrees (e.g., 0.2 or 1,0.1)
Relation of image and specified Region of Interest.
No selection matches all, multiple values legal.
Identifier (plate number) for the DFBS plate.
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Limit to items.