value unc_up unc_lo author ref method 4.77 0.258 0.258 Masiero 2011ApJ...741...68M NEATM 4.80 1.630 1.630 Nugent 2016AJ....152...63N NEATM 5.52 0.160 0.160 Masiero 2012ApJ...759L...8M NEATM