In "Planets to cosmology : essential science in the final years of the Hubble Space Telescope", Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland, May 3-6, 2004. Edited by Mario Livio and Stefano Casertano. Cambridge, UK: Cambridge University Press, 2006. Space Telescope Science Institute symposium series, Vol. 18. ISBN 0-521-84758-3.
astro-ph/0407538

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Abstract. Reverberation mapping is a proven technique that is used to measure the size of the broad emission-line region and central black hole mass in active galactic nuclei. More ambitious reverberation mapping programs that are well within the capabilities of Hubble Space Telescope could allow us to determine the nature and flow of line-emitting gas in active nuclei and to assess accurately the systematic uncertainties in reverberation-based black hole mass measurements.

Table of Contents

• INTRODUCTION: THE INNER STRUCTURE OF AGNs
• REVERBERATION MAPPING BASICS
• REVERBERATION RESULTS
• THE FUTURE: WHAT WILL IT TAKE TO MAP THE BROAD-LINE REGION?
• SUMMARY
• REFERENCES