Fig. 1
The [6.2]/[11.2] μm vs. the [11.0]/[11.2] μm PAH band integrated intensity ratio in NGC 7023-NW. The 11.2 μm and 11.0 μm measurements were made using the IRS-SH observations, while the [6.2]/[11.2] μm ratio was measured using the IRS-SL observations (see text for details). The instrumental error is comparable to the symbol size.
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