value unc_up unc_lo author ref method 7.04 1.590 1.590 Nugent 2016AJ....152...63N NEATM 7.24 1.860 1.860 Nugent 2016AJ....152...63N NEATM 8.01 0.420 0.420 Masiero 2012ApJ...759L...8M NEATM