Relativistic effects on the imaging by a rotating optical system

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dc.creatorAnglada-Escude, G.
dc.creatorKlioner, S.
dc.creatorSoffel, M.
dc.creatorTorra, J.
dc.date2005-10-07
dc.date2006-09-05
dc.date.accessioned2026-07-07T06:43:47Z
dc.date.available2026-07-07T06:43:47Z
dc.descriptionContext. High accuracy astrometric instruments like Gaia aiming at an accuracy of 1 microarcsecond cannot be considered as point-like observers in the framework of relativistic modelling of observable quantities. Aims. Special-relativistic effects on the imaging by a non-point-like arbitrarily moving optical instrument are discussed. Methods. A special-relativistic reflection law for a mirror of arbitrary shape and motion is derived in the limit of geometrical optics. The aberration patterns are computed with ray tracing using a full pecial-relativistic model for two simple rotating optical instrument. Results. It was found that the effect of special-relativistic reflection law on the photocenters of aberration patterns of an optical system rotating with a moderate angular velocity of $60 \arcsec/{\rm s}$ may be at the level of 1 microarcsecond if the system involves mirrors significantly inclined relative to the optical axis. Conclusions. Special-relativistic optical modelling of the future astrometric instrument is generally speaking indispensable if a level of a few microarcseconds is envisaged.
dc.description12 pages, 9 figures. Major changes in the paper structure. More detailed discussions on propagation delays added. New figures added
dc.identifierhttps://arxiv.org/abs/astro-ph/0510226
dc.identifierhttp://arxiv.org/abs/astro-ph/0510226
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102545
dc.subjectAstrophysics
dc.titleRelativistic effects on the imaging by a rotating optical system
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