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Absolute kinematics of radio source components in the complete S5 polar cap sample

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Absolute kinematics of radio source components in the complete S5 polar cap sample

dc.contributor.author	Martí Vidal, Iván
dc.contributor.author	Marcaide Osoro, Juan María
dc.contributor.author	Guirado Puerta, Jose Carlos
dc.contributor.author	Pérez Torres, Miguel Ángel
dc.contributor.author	Ros Ibarra, Eduardo
dc.date.accessioned	2011-03-28T07:16:50Z
dc.date.available	2011-03-28T07:16:50Z
dc.date.issued	2008
dc.identifier.citation	Martí-Vidal, I., Marcaide, J. M., Guirado, J. C., Pérez Torres, Miguel Ángel, and Ros, E. (2008): Absolute kinematics of radio source components in the complete S5 polar cap sample: III. First wide-field high-precision astrometry at 15.4GHz, Astronomy and Astrophysics, núm. 478, vol. 1, pp. 267-275	en
dc.identifier.uri	http://hdl.handle.net/10550/18547
dc.description.abstract	We report on the first wide-field, high-precision astrometric analysis of the 13 extragalactic radio sources of the complete S5 polar cap sample at 15.4 GHz. We describe new algorithms developed to enable the use of differenced phase delays in wide-field astrometric observations and discuss the impact of using differenced phase delays on the precision of the wide-field astrometric analysis. From this global fit, we obtained estimates of the relative source positions with precisions ranging from 14 to 200 μas at 15.4 GHz, depending on the angular separation of the sources (from ∼1.6 to ∼20.8 degrees). These precisions are ∼10 times higher than the achievable precisions using the phase-reference mapping technique.	en
dc.language.iso	en	en
dc.subject	Astrometry; Techniques : interferometric; Galaxies : quasars : general; Galaxies : BL Lacertae objects : general; Radio continuum : general	en
dc.title	Absolute kinematics of radio source components in the complete S5 polar cap sample	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Galaxias	en
dc.subject.unesco	UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Otras especialidades astronómicas	en
dc.identifier.doi	10.1051/0004-6361:20078067	en
dc.identifier.idgrec	049800	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361:20078067&Itemid=129	en