By using gamma-ray burst (GRB) data to simultaneously constrain Amati correlation
parameters and cosmological parameters in six spatially flat and nonflat dark energy cosmological
models, we show that an updated 220 GRB version of the Jia et al. [1] GRB data
compilation are standardizable through the Amati correlation and so can be used for cosmological
analyses. However, the resulting GRB data constraints on the current value of the nonrelativistic
matter density parameter, Ω
m
0, are in > 2σ tension with those from a joint
analysis of better-established Hubble parameter [H(z)] and baryon acoustic oscillation (BAO)
data for most of the cosmological models we consider, indicating that these GRB data cannot be
jointly used with better-established H(z) + BAO data to constrain cosmological parameters.