value unc_up unc_lo author ref method 2.7800e+19 3.9800e+18 3.9800e+18 Ivantsov 2008P&SS...56.1857I Deflec 3.9800e+16 7.9600e+15 7.9600e+15 Krasinsky Krasinsky Deflec 4.1800e+19 3.1800e+19 3.1800e+19 Vasiliev Vasiliev Deflec