Fig. 5
Swift-XRT measurements during the campaign. All points have been fit with a constant (black dashed line). Top panel: X-ray light curve in an energy range of 2–10 keV. Middle panel: photon spectral index. Bottom panel: neutral hydrogen column density. For comparison, the Galactic NH value of 0.12 × 1022 cm-2 for IC 310 (Kalberla et al. 2010) is shown as a dashed blue line.
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