value unc_up unc_lo author ref method 5.57 0.047 0.047 Masiero 2011ApJ...741...68M NEATM 6.36 1.780 1.780 Nugent 2016AJ....152...63N NEATM 6.98 0.140 0.140 Masiero 2012ApJ...759L...8M NEATM