value unc_up unc_lo author ref method 7.35 0.290 0.290 Masiero 2012ApJ...759L...8M NEATM 8.17 0.150 0.150 Masiero 2014ApJ...791..121M NEATM 8.76 0.063 0.063 Masiero 2011ApJ...741...68M NEATM