Extinction maps of Galactic molecular clouds (left) and corresponding Δ-variance spectrum with errors (right). See Appendix C how the error using Poisson statistic was calculated. The gray scale range of extinction (AV) is given in the wedge of each plot. The dashed lines indicate the pixel size (2′) and the size of the map. If the mapsize is larger than the x-axis scale (500 arcmin), its size is noted in the plot. The small-scale slope β and its error are given in each diagram, the fit range is indicated by two gray lines. The red curve for Perseus represents 13CO 1 → 0 data from the Bell Labs (see Table 1 and Bensch et al. 2001). The lower x-axis is labeled in arcmin, the upper one in parsec. All coordinates are in RA and Dec epoch2000.
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