Correlations between spectral parameters of IGR J16320–4751. Left panel: Flux_Kα with respect to Flux_T. Right panel: Flux_Kα normalized to Flux_T, with respect to the intrinsic N_H. Error bars correspond to the 90% confidence level. Blue dots correspond to earlier observations from 2003 and 2004. Green dots indicate split observations (see Sect. 3.1). The figures suggest two possible correlations between these spectral parameters for the whole set of XMM-Newton observations. Using a Pearson test we found R = 0.76 with a p-value = 0.002 for the left panel and R = 0.77 for a probability p-value = 0.001 for the right panel.