value unc_up unc_lo author ref method 6.07 0.057 0.057 Masiero 2011ApJ...741...68M NEATM 6.40 1.690 1.690 Nugent 2016AJ....152...63N NEATM 9.64 4.070 4.070 Masiero 2012ApJ...759L...8M NEATM