value unc_up unc_lo author ref method 6.97 0.190 0.190 Masiero 2014ApJ...791..121M NEATM 7.02 0.170 0.170 Nugent 2016AJ....152...63N NEATM 7.25 0.330 0.330 Masiero 2012ApJ...759L...8M NEATM 7.50 0.069 0.069 Masiero 2011ApJ...741...68M NEATM