value unc_up unc_lo author ref method 5.93 1.360 1.360 Nugent 2016AJ....152...63N NEATM 5.98 0.150 0.150 Masiero 2012ApJ...759L...8M NEATM 6.24 0.118 0.118 Masiero 2011ApJ...741...68M NEATM 6.74 0.270 0.270 Masiero 2012ApJ...759L...8M NEATM