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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…
The Calan-Yale Deep Extragalactic Research (CYDER) Survey: Optical Properties and Deep Spectroscopy of Serendipitous X-ray Sources
Ezequiel Treister, Francisco Castander, Thomas Maccarone +8
We present the first results from the Calán-Yale Deep Extragalactic Research (CYDER) survey. The main goal of this survey is to study serendipitous X-ray sources detected by Chandr…
GOODS Discovery of a Significant Population of Obscured AGN
C. M. Urry, E. Treister
We analysed the optical and infrared properties of X-ray sources in the Great Observatories Origins Deep Survey (GOODS), a deep multiwavelength survey covering 0.1 square degrees i…
H1517+656: the Birth of a BL Lac Object?
Matthew O'Dowd, C. Megan Urry, Riccardo Scarpa +2
H1517+656 is an unusual source, even for a BL Lac object. It is one of the most luminous BL Lacs known, with extreme emission properties at radio, optical, and X-ray frequencies. F…
The nature of close companions of the BL Lac Objects 1ES 0502+675 and 1ES 1440+122
G. Giovannini, R. Falomo, R. Scarpa +2
We report on deep radio images and optical spectroscopy of two BL Lac objects that have very close compact companions. The two targets, 1ES 0502+675 and 1ES 1440+122, were selected…
Jets from Sub-Parsec to Kiloparsec Scales: A Physical Connection
F. Tavecchio, L. Maraschi, R. M. Sambruna +4
The Chandra discovery of bright X-ray emission from kpc-scale jets allows insight into the physical parameters of the jet flow at large scale. At the opposite extreme, extensive st…