value unc_up unc_lo author ref method 0.306 0.0670 0.0670 Masiero 2012ApJ...759L...8M NEATM 0.324 0.0555 0.0555 Masiero 2011ApJ...741...68M NEATM 0.330 0.0500 0.0500 Masiero 2014ApJ...791..121M NEATM