descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 21 May 2009Embargo end date: 01 Jan 2009Publisher:American Astronomical SocietyJournal:The Astronomical Journal, volume 138, pages 19-27 (issn: 0004-6256, eissn: 1538-3881,

Authors: Kaczmarczik, Michael C.; Richards, Gordon T.; Mehta, Sajjan S.; Schlegel, David J.;

doi: 10.1088/0004-6256/138/1/19 , 10.48550/arxiv.0904.3909

arXiv: 0904.3909

ASTROMETRIC REDSHIFTS FOR QUASARS

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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

29 pages, 13 figures (3 color); AJ, accepted

Related Organizations

Drexel University
United States
Lawrence Berkeley National Laboratory
United States

Keywords

Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Astrophysics of Galaxies, Instrumentation and Methods for Astrophysics (astro-ph.IM)

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