Fig. 2.
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Left: differential hydrogen column density in Sector 1. The Swift-XRT data are in green, the data obtained with the first XMM-Newton observation in black, and the data obtained with the second XMM-Newton observation in red. Right: Differential hydrogen column density in Sector 2. The data obtained with the first XMM-Newton observation are in black, and the data obtained with the second XMM-Newton observation in red. The blue arrows highlight the four main peaks observed by both XMM-Newton and Swift.
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