value unc_up unc_lo author ref method 3.72 0.301 0.301 Masiero 2011ApJ...741...68M NEATM 3.75 1.057 1.057 Masiero 2011ApJ...741...68M NEATM 4.00 1.130 1.130 Nugent 2016AJ....152...63N NEATM