value unc_up unc_lo author ref method 5.69 0.630 0.630 Masiero 2014ApJ...791..121M NEATM 7.10 0.057 0.057 Masiero 2011ApJ...741...68M NEATM 7.70 0.190 0.190 Masiero 2012ApJ...759L...8M NEATM