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Fig. 4


Left panel: extinction map of the OMC-1 derived as described in the text. The color bar shows the correspondence between the gray scale and visual extinctions. We also mark the boundaries of the three regions outlined by R10. Central panel: ISPI KS mosaic of the surveyed ONC. The overplotted contours represent the AV = 10 (yellow line) and the AV = 20 (red line) levels. Right panel: the error map for our derived OMC-1 extinction map. See Fig. B.1 for larger views of the left and central panels.

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