value unc_up unc_lo author ref method 0.420 0.1700 0.1700 Nugent 2016AJ....152...63N NEATM 0.498 0.0590 0.0590 Masiero 2012ApJ...759L...8M NEATM 0.669 0.1819 0.1819 Masiero 2011ApJ...741...68M NEATM 0.720 0.0300 0.0300 Masiero 2014ApJ...791..121M NEATM