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Quasi-simultaneous optical/near-IR photometry is presented for a sample of 37 luminous optically selected QSOs drawn from the Large Bright QSO Survey. Most of the QSOs have decreased in brightness since discovery; this is expected in flux-limited samples. The continuum shape of most of the QSOs can be represented by a power law of the form F ( v ) ∝ v −0·3 , but a few have softer (redder) continuum slopes.
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Paul Francis (1996) studied this question.
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