A UV-to-NIR composite spectrum of ~61,000 SDSS type-1 QSOs from SPHEREx yields α_ν ≈ −0.10 (optical) and −1.46 (NIR), luminosity-dependent slopes consistent with a receding torus, Case-B line ratios, and an anti-Baldwin trend for H and Paschen lines.
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A UV-to-Near-infrared QSO Composite Spectrum from the SPHEREx All-Sky Survey
A UV-to-NIR composite spectrum of ~61,000 SDSS type-1 QSOs from SPHEREx yields α_ν ≈ −0.10 (optical) and −1.46 (NIR), luminosity-dependent slopes consistent with a receding torus, Case-B line ratios, and an anti-Baldwin trend for H and Paschen lines.