value unc_up unc_lo author ref method 6.53 0.070 0.070 Masiero 2014ApJ...791..121M NEATM 6.82 0.108 0.108 Masiero 2011ApJ...741...68M NEATM 8.33 1.620 1.620 Nugent 2016AJ....152...63N NEATM 9.24 0.560 0.560 Masiero 2012ApJ...759L...8M NEATM