value unc_up unc_lo author ref method 5.59 0.041 0.041 Masiero 2011ApJ...741...68M NEATM 6.14 2.270 2.270 Nugent 2016AJ....152...63N NEATM 6.23 2.380 2.380 Masiero 2012ApJ...759L...8M NEATM