Correlations between spectral parameters of IGR J16320–4751. Left panel: FluxKα with respect to FluxT. Right panel: FluxKα normalized to FluxT, with respect to the intrinsic NH. 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.
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