value unc_up unc_lo author ref method 2.83 0.890 0.890 Nugent 2016AJ....152...63N NEATM 3.06 0.135 0.135 Masiero 2011ApJ...741...68M NEATM 3.70 1.145 1.145 Masiero 2011ApJ...741...68M NEATM