4 papers
Infrared Number Counts of AGN in the GOODS Fields
E. Treister, C. Megan Urry, the GOODS AGN Team
Using the known numbers and evolution of unobscured AGN, and assuming that there is a large number of corresponding obscured AGN -- as expected if AGN unification is correct -- we…
Infrared Properties of AGN in the GOODS Fields: AGN in Stellar Dominated High-z Galaxies
Jeffrey Van Duyne, C. Meg Urry, Eleni Chatzichristou +2
We present analysis of spectral energy distributions (SEDs) from mid-infrared through X-ray of a sample of 420 hard X-ray selected, z-band and Spitzer/IRAC detected active galactic…
Obscured AGN in Multiwavelength Surveys
Ezequiel Treister, C. M. Urry, Jeff Van Duyne +1
Using a simple unification model for AGN, with a fixed ratio of obscured to unobscured AGN of 3:1, we explain the X-ray, optical and infrared properties of the X-ray sources in the…
Deep HST WFPC2 Photometry of M31's Thick Disk(?)
Ata Sarajedini, Jeffrey Van Duyne
We present deep color-magnitude diagrams (CMDs) for a field along the outer disk of M31 based on archival Hubble Space Telescope Wide Field Planetary Camera 2 observations in the F…