value unc_up unc_lo author ref method 4.23 0.256 0.256 Masiero 2011ApJ...741...68M NEATM 5.05 1.530 1.530 Nugent 2016AJ....152...63N NEATM 5.98 1.670 1.670 Masiero 2012ApJ...759L...8M NEATM