value unc_up unc_lo author ref method 5.44 0.010 0.010 Masiero 2014ApJ...791..121M NEATM 5.97 0.089 0.089 Masiero 2011ApJ...741...68M NEATM 6.48 0.330 0.330 Masiero 2012ApJ...759L...8M NEATM