Restframe UV-to-optical spectroscopy of APM 08279+5255 - BAL classification and black hole mass estimates

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Table 2

APM 08279+5255 indexes of absorptionassociated to the main BAL transitions in quasars.

Transition	BI (km s⁻¹)	BI₀ (km s⁻¹)	AI (km s⁻¹)
Si IV	<70	—	<230
C IV	3370 ± 200	2430 ± 300	4210 ± 240
Al III	<10	—	<110
Mg II	<170	—	<490

Notes. Locations marked with “—” indicate indexes for which a reliable upper limit cannot be provided.

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