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astro-ph2002
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…
astro-ph2001
Spectropolarimetry of Broad H_alpha Lines and Geometry of the BLR
Marshall H. Cohen, Andre' R. Martel
In a small fraction of Broad Line Radio Galaxies (BLRG) and Seyfert 1 galaxies, the polarization position angle rotates across the broad emission lines, especially at H_alpha. An u…