value unc_up unc_lo author ref method 5.09 0.163 0.163 Masiero 2011ApJ...741...68M NEATM 5.19 1.340 1.340 Nugent 2016AJ....152...63N NEATM 5.36 1.490 1.490 Nugent 2016AJ....152...63N NEATM