value unc_up unc_lo author ref method 5.83 0.290 0.290 Masiero 2012ApJ...759L...8M NEATM 7.88 0.060 0.060 Masiero 2014ApJ...791..121M NEATM 8.42 0.034 0.034 Masiero 2011ApJ...741...68M NEATM