| Astrometric Redshifts for Quasars (2009) | |||||||||
Abstract | |||||||||
| The wavelength dependence of atmospheric refraction causes differential chromatic refraction (DCR), whereby objects imaged at different optical/UV wavelengths are observed at slightly different positions in the plane of the detector. Strong spectral features induce changes in the effective wavelengths of broad-band filters that are capable of producing significant positional offsets with respect to standard DCR corrections. We examine such offsets for broad-emission-line (type 1) quasars from the Sloan Digital Sky Survey (SDSS) spanning 0. Comment: 29 pages, 13 figures (3 color); AJ, accepted | |||||||||
Publication details | |||||||||
| |||||||||