value unc_up unc_lo author ref method 0.204 0.0224 0.0224 Masiero 2011ApJ...741...68M NEATM 0.220 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM 0.322 0.0270 0.0270 Masiero 2012ApJ...759L...8M NEATM 0.340 0.1500 0.1500 Nugent 2016AJ....152...63N NEATM