def METHOD_NAME(self):
    # XRT data values are in DN and are converted into DN/s if the data has been normalized.
    # A tag starting with "XRT_RENORMALIZE" is added to the HISTORY tag in that case.
    # See Table 1.1 and Section 2.11 of the XRT Analysis Guide.
    METHOD_NAME = super().METHOD_NAME
    if not METHOD_NAME:
        METHOD_NAME = u.ct
        history = self.meta.get('HISTORY', '')
        if "xrt_renormalize" in history.lower():
            METHOD_NAME = u.ct / u.second
    return METHOD_NAME