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Fig. 1


Extinction map of the Shank in the Pipe Nebula based on the near-infrared color excess (Román-Zúñiga et al. 2010). Overlaid are the positions of the targets. The sources where water ice is positively detected are marked by yellow crosses, while those with negative detections are marked by orange crosses. The zoom-in view of the positive detections at the regions A and B are shown in the middle and right panel, respectively.

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