value unc_up unc_lo author ref method 3.86 0.620 0.620 Nugent 2016AJ....152...63N NEATM 4.48 0.208 0.208 Masiero 2011ApJ...741...68M NEATM 4.72 1.020 1.020 Nugent 2016AJ....152...63N NEATM