value unc_up unc_lo author ref method 0.200 0.1300 0.1300 Nugent 2016AJ....152...63N NEATM 0.273 0.0510 0.0510 Masiero 2012ApJ...759L...8M NEATM 0.326 0.0316 0.0316 Masiero 2011ApJ...741...68M NEATM