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Fig. 4.
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Example AKARI spectrum of quasar PG2112+059 at galactic coordinates (272.101907, 64.128918), showing spectral indices αmag (obtained using the W1 − W2 method) and αeff (obtained from direct spectral integration via Eq. (24)). These spectral indices are plotted as pure power laws, Sν ∝ ν−α.
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