Fig. 4.

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Visual extinction, AV, as a function of distance along the sight line to SGR 0501+4516. The solid black line is the best-fit Green et al. (2019) Bayestar 3D dust map extinction along the sight line. Dashed grey lines are random draws from the Bayestar probability distribution. Also shown are the total sight-line extinctions from Schlegel et al. (1998) and Schlafly & Finkbeiner (2011). The Bayestar flattening at ∼3.5–4 kpc corresponds to the point at which main sequence stars can no longer be detected (and the extinction estimate becomes unreliable). The distance to SGR 0501+4516 is unknown, but we assumed it lies at ∼2 kpc, in the Perseus spiral arm.

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