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dc.contributor.authorBarcons, Xavier-
dc.contributor.authorCarballo, R.-
dc.contributor.authorCarrera, Francisco J.-
dc.contributor.authorCeballos, María Teresa-
dc.contributor.authorGonzález-Serrano, José Ignacio-
dc.contributor.authorParedes, J. M.-
dc.contributor.authorRibó, M.-
dc.contributor.authorWarwick, R. S.-
dc.identifierdoi: 10.1046/j.1365-8711.2003.06652.x-
dc.identifierissn: 0035-8711-
dc.identifiere-issn: 1365-2966-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 343(1): 137-142 (2003)-
dc.description.abstractWe present new XMM-Newton X-ray observations of the z = 1.246 narrow-line radio quasar RX J1011.2+5545 serendipitously discovered by ROSAT. The flat X-ray spectrum previously measured by ROSAT and ASCA is shown to be the result of a steep F ∼ 1.8 power-law spectrum seen through a moderate intrinsic absorbing column (NH ∼ 4 × 1021 cm -2). The position of the X-ray source is entirely coincident with the nucleus of the radio source that we have resolved in new sensitive VLA observations at 3.6 and 6 cm, implying that scattering in the radio lobes is not responsible for the bulk of X-ray emission. In the EPIC pn image, a faint patch of X-ray emission is apparent 14 arcsec to the north-east of the main X-ray source. The former is positionally coincident with an apparently extended optical object with R ∼21.9, but there is no associated radio emission, thus ruling out the possibility that this represents a hotspot in a jet emanating from the primary X-ray source. No reflection features are detected in the X-ray spectrum of the narrow-line radio quasar, although an Fe line with an equivalent width of up to 600 eV cannot be ruled out.-
dc.description.sponsorshipWe acknowledge financial support by the Ministerio de Ciencia y Tecnología (Spain), under grants AYA2000-1690 (XB, FJC, MTC), AYA2002-03326 (RC, JIGS) and AYA2001-3092 (MR, JMP). MR and JMP acknowledge also partial support by the European Regional Development Fund (ERDF/FEDER). During this work, MR has been supported by a fellowship from CIRIT (Generalitat de Catalunya, ref. 1999 F I 00199).-
dc.publisherRoyal Astronomical Society-
dc.publisherOxford University Press-
dc.relation.isversionofPublisher's version-
dc.subjectGalaxies: active-
dc.subjectX-rays: galaxies-
dc.titleOn the origin of the X-ray emission from a narrow-line radio quasar at z > 1-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Ciencia y Tecnología (España)-
dc.contributor.funderEuropean Commission-
dc.contributor.funderGeneralitat de Catalunya-
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