value unc_up unc_lo author ref method 6.39 0.110 0.110 Masiero 2014ApJ...791..121M NEATM 6.92 0.048 0.048 Masiero 2011ApJ...741...68M NEATM 7.02 1.070 1.070 Nugent 2016AJ....152...63N NEATM 7.69 0.250 0.250 Masiero 2012ApJ...759L...8M NEATM