4 papers · 1 filter
Calibration of Geometric Distortion in the ACS Detectors
G. R. Meurer, D. Lindler, J. P. Blakeslee +9
The off-axis location of the Advanced Camera for Surveys (ACS) is the chief (but not sole) cause of strong geometric distortion in all detectors: the Wide Field Camera (WFC), High…
Unification Model of Seyfert Galaxies: Are All Seyfert 2 Galaxies Created Equal?
Hien D. Tran
Based on the analysis of a large spectropolarimetric survey of Seyfert 2 galaxies (S2s) from the CfA and 12-micron samples conducted mostly at Lick and Palomar Observatories, it is…
Hidden Quasars in Ultraluminous Infrared Galaxies
H. D. Tran, M. S. Brotherton, S. A. Stanford +1
Many ultraluminous infrared galaxies (ULIRGs) are powered by quasars hidden in the center, but many are also powered by starbursts. A simply diagnostic diagram is proposed that can…
Optical continuum structure of Cygnus A
R. A. E. Fosbury, J. Vernet, M. Villar-Martin +4
As a prerequisite for interpreting new observations of the most distant radio galaxies, we make an optical study of the closest powerful radio source, Cygnus A. Using Keck imaging-…