摘要:Owing to an issue in the fitting program XSPEC version 12.8.2 1 ,
the correlations of metallicity with redshift and temperature in
Hofmann et al. (2016) need to be revised. The bug caused nor-
malisation (η) and metallicity (Z) in the apec model to be a fac-
tor of ∼ (1 + z) too low (z, redshift of the source).