value unc_up unc_lo author ref method 12.29 0.450 0.450 Masiero 2012ApJ...759L...8M NEATM 14.75 3.630 3.630 Nugent 2016AJ....152...63N NEATM 17.00 6.020 6.020 Nugent 2016AJ....152...63N NEATM