value unc_up unc_lo author ref method 3.91 3.190 3.190 Nugent 2016AJ....152...63N NEATM 4.57 0.034 0.034 Masiero 2011ApJ...741...68M NEATM 4.65 1.612 1.612 Masiero 2011ApJ...741...68M NEATM