def type2_yconvert(col_excit, direct='f'):
    """This function extrapolates excitation rates through the burgess-tully method
       see On the anlysis of collision strengths and rate coefficients A burgess and J.A. Tully

    :param col_excit: excitation rates of the levels that are being transformed
    :type temp_grid: array

    :returns: array --type2 burgess y values

    """
    return col_excit
