code: def offset_to_skydir(skydir, offset_lon, offset_lat,
                       coordsys='CEL', projection='AIT'):
      
  
      offset_lon = np.array(offset_lon, ndmin=1)
      offset_lat = np.array(offset_lat, ndmin=1)
  
      w = create_wcs(skydir, coordsys, projection)
      return SkyCoord.from_pixel(offset_lon, offset_lat, w, 0)
docs: Convert a cartesian offset (X,Y) in the given projection into
      a SkyCoord.