value unc_up unc_lo author ref method 5.43 0.193 0.193 Masiero 2011ApJ...741...68M NEATM 6.08 1.990 1.990 Nugent 2016AJ....152...63N NEATM 6.09 1.900 1.900 Masiero 2012ApJ...759L...8M NEATM