value unc_up unc_lo author ref method 3.42 0.620 0.620 Nugent 2016AJ....152...63N NEATM 4.31 0.760 0.760 Nugent 2016AJ....152...63N NEATM 4.77 0.307 0.307 Masiero 2011ApJ...741...68M NEATM