ar X iv : a st ro - p h / 04 07 53 8 v 1 2 6 Ju l 2 00 4 Reverberation mapping of active galactic nuclei

ar X iv : a st ro - p h / 04 03 64 6 v 1 28 M ar 2 00 4 X - ray Survey Results on Active Galaxy Physics and Evolution

The cosmic X-ray background (XRB) is largely due to accretion onto supermassive black holes integrated over cosmic time. Thus, extragalactic X-ray surveys offer the potential to contribute substantially to our understanding of the physics of Active Galactic Nuclei (AGN) as well as the evolution of the AGN population. Such surveys have dramatically advanced over the past four years, largely due ...

ar X iv : a st ro - p h / 06 07 53 9 v 1 2 4 Ju l 2 00 6 CLUSTERS AND THE COSMIC WEB : Identifying the location of filaments

ar X iv : a st ro - p h / 06 05 03 8 v 1 1 M ay 2 00 6 The Mass of the Central Black Hole in the Seyfert Galaxy NGC 4151

In order to improve the reverberation-mapping based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC 4151, we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with the International Ultraviolet Explorer. We measure emission-line time delays for four lines, C IVλ1549, He IIλ1640, C III]λ1909, and Mg IIλ2798, from both ca...

ar X iv : a st ro - p h / 04 07 16 1 v 1 8 J ul 2 00 4 H 2 Omegamasers : Accretion disks , jet interaction , outflows or massive star formation ?

The 25 years following the serendipitous discovery of megamasers have seen tremendous progress in the study of luminous extragalactic H2O emission. Singledish monitoring and high resolution interferometry have been used to identify sites of massive star formation, to study the interaction of nuclear jets with dense molecular gas and to investigate the circumnuclear environment of active galacti...

ar X iv : a st ro - p h / 04 07 23 2 v 1 1 2 Ju l 2 00 4 B The Saas Fee Lectures on Strong Gravitational Lensing