value unc_up unc_lo author ref method 17.42 0.310 0.310 Masiero 2014ApJ...791..121M NEATM 18.26 3.700 3.700 Nugent 2016AJ....152...63N NEATM 19.88 0.150 0.150 Masiero 2012ApJ...759L...8M NEATM 20.05 0.054 0.054 Masiero 2011ApJ...741...68M NEATM