value unc_up unc_lo author ref method 4.47 0.170 0.170 Masiero 2012ApJ...759L...8M NEATM 4.61 1.000 1.000 Nugent 2016AJ....152...63N NEATM 5.32 0.151 0.151 Masiero 2011ApJ...741...68M NEATM