Fig. 3

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Spitzer image of a wider portion of the sky, containing the original area of GX 301-2. The green polygon is the uncertainty cone for GX 301-2 peculiar velocity, truncated orthogonally to −Vpec so that the supernova event occurred between 250 kyr and 1 Myr. The yellow line is the average line for the trajectory. The HAWK-I image is to scale.
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