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Article Contents

ABSTRACT

1.INTRODUCTION

2.THE CONTINUUM
2.1.The IR Continuum
2.2.The Optical-UV Continuum
2.3.The X-ray Continuum
2.3.1.The Soft Excess
2.3.2.The Hard X-ray Power Law
2.3.3.X-ray Reflection and Absorption
2.4.The gamma-ray Continuum

3.THE BROAD-LINE REGION
3.1.Observational Methods
3.2.The Standard BLR Model
3.3.Recent Developments
3.3.1.The NGG 5548 and 4151 Campaigns
3.3.2.The Accretion Disk Model

4.THE CENTRAL BLACK HOLES IN ACTIVE GALACTIC NUCLEI
4.1.Formation
4.2.Methods of Inferring the Mass

5.CONCLUSIONS

REFERENCES