value unc_up unc_lo author ref method 15.18 4.410 4.410 Masiero 2017AJ....154..168M NEATM 16.78 0.390 0.390 Masiero 2012ApJ...759L...8M NEATM 16.94 5.105 5.105 Masiero 2017AJ....154..168M NEATM 18.35 5.330 5.330 Nugent 2016AJ....152...63N NEATM