code: def get_pixbeam_pixel(self, x, y):
          
          ra, dec = self.pix2sky((x, y))
          return self.get_pixbeam(ra, dec)
docs: Determine the beam in pixels at the given location in pixel coordinates.
  
          Parameters
          ----------
          x , y : float
              The pixel coordinates at which the beam is determined.
  
          Returns
          -------
          beam : :class:`AegeanTools.fits_image.Beam`
              A beam object, with a/b/pa in pixel coordinates.