value unc_up unc_lo author ref method 13.62 0.291 0.291 Masiero 2011ApJ...741...68M NEATM 18.81 4.360 4.360 Nugent 2016AJ....152...63N NEATM 18.87 4.890 4.890 Nugent 2016AJ....152...63N NEATM