value unc_up unc_lo author ref method 5.72 0.360 0.360 Masiero 2012ApJ...759L...8M NEATM 6.34 0.080 0.080 Masiero 2014ApJ...791..121M NEATM 6.65 0.034 0.034 Masiero 2011ApJ...741...68M NEATM