value unc_up unc_lo author ref method 4.87 0.550 0.550 Masiero 2012ApJ...759L...8M NEATM 5.90 1.470 1.470 Nugent 2016AJ....152...63N NEATM 6.06 0.091 0.091 Masiero 2011ApJ...741...68M NEATM