value unc_up unc_lo author ref method 12.25 3.530 3.530 Nugent 2016AJ....152...63N NEATM 13.71 5.360 5.360 Nugent 2016AJ....152...63N NEATM 15.29 6.600 6.600 Masiero 2012ApJ...759L...8M NEATM