value unc_up unc_lo author ref method 0.220 0.1300 0.1300 Nugent 2016AJ....152...63N NEATM 0.473 0.0770 0.0770 Masiero 2012ApJ...759L...8M NEATM 0.499 0.1428 0.1428 Masiero 2011ApJ...741...68M NEATM