docs: def crpix(self):
          """
          The location of the reference coordinate in the pixel frame.
  
          First simple respond with the header values, if they don't exist try usnig the DETSEC values
          @rtype: float, float
          """
          try:
              return self.wcs.crpix1, self.wcs.crpix2
          except Exception as ex:
              logging.debug("Couldn't get CRPIX from WCS: {}".format(ex))
              logging.debug("Switching to use DATASEC for CRPIX value computation.")
  
          try:
              (x1, x2), (y1, y2) = util.get_pixel_bounds_from_datasec_keyword(self['DETSEC'])
              dx = float(self['NAXIS1'])
              dy = float(self['NAXIS2'])
          except KeyError as ke:
              raise KeyError("Header missing keyword: {}, required for CRPIX[12] computation".format(ke.args[0]))
  
          crpix1 = self._DET_X_CEN - (x1 + x2) / 2. + dx / 2.
          crpix2 = self._DET_Y_CEN - (y1 + y2) / 2. + dy / 2.
  
          return crpix1, crpix2