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Model Dependence of XRISM Black Hole Spin Constraints in Cyg X-1

  • Authors: Andrzej A. Zdziarski, Swadesh Chand, Michał Szanecki, Gulab Dewangan, Barbara De Marco

Andrzej A. Zdziarski et al 2026 The Astrophysical Journal Letters 1005 .

  • Provider: AAS Journals

Caption: Figure 5.

The data-to-model ratios for the models fitted to the Resolve data alone are shown for the broadband data. The red, blue, and black symbols correspond to the relxill, relxillCp, and reflkerrD models, respectively. The NICER and NuSTAR data are renormalized using the cross-calibration coefficients of our best broadband model (see the last column in Table 3). We see that all of the models fitted to 2.6–12 keV Resolve data diverge from the data beyond that range.

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