value unc_up unc_lo author ref method 5.46 0.890 0.890 Nugent 2016AJ....152...63N NEATM 6.33 1.540 1.540 Nugent 2016AJ....152...63N NEATM 6.96 0.220 0.220 Masiero 2012ApJ...759L...8M NEATM