value unc_up unc_lo author ref method 14.09 3.140 3.140 Nugent 2016AJ....152...63N NEATM 14.18 4.890 4.890 Masiero 2017AJ....154..168M NEATM 16.58 3.960 3.960 Masiero 2012ApJ...759L...8M NEATM