Show simple item record

dc.contributor.authorMateos Ibáñez, Silvia 
dc.contributor.authorAlonso Herrero, Almudena
dc.contributor.authorCarrera Troyano, Francisco Jesús 
dc.contributor.authorBlain, Andrew W.
dc.contributor.authorWatson, Mike G.
dc.contributor.authorBarcons Jáuregui, Xavier
dc.contributor.authorBraito, Valentina
dc.contributor.authorSevergnini, Paola
dc.contributor.authorDonley, Jennifer L.
dc.contributor.authorStern, Daniel
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.date.accessioned2013-12-26T11:19:32Z
dc.date.available2013-12-26T11:19:32Z
dc.date.issued2012-11
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.urihttp://hdl.handle.net/10902/4083
dc.description.abstractWe present a highly complete and reliable mid-infrared (MIR) colour selection of luminous active galactic nucleus (AGN) candidates using the 3.4, 4.6 and 12 μm bands of the Widefield Infrared Survey Explorer (WISE) survey. The MIR colour wedge was defined using the wide-angle Bright Ultrahard XMM–Newton survey (BUXS), one of the largest complete flux-limited samples of bright (f4.5–10 keV > 6×10−14 erg s−1 cm−2) ‘ultrahard’ (4.5–10 keV) X-ray-selected AGN to date. The BUXS includes 258 objects detected over a total sky area of 44.43 deg2 of which 251 are spectroscopically identified and classified, with 145 being type 1 AGN and 106 type 2 AGN. Our technique is designed to select objects with red MIR power-law spectral energy distributions (SEDs) in the three shortest bands of WISE and properly accounts for the errors in the photometry and deviations of the MIR SEDs from a pure power-law. The completeness of the MIR selection is a strong function of luminosity. At L2–10 keV > 1044 erg s−1, where the AGN is expected to dominate the MIR emission, 97.1+2.2 −4.8 and 76.5+13.3 −18.4 per cent of the BUXS type 1 and type 2 AGN, respectively, meet the selection. Our technique shows one of the highest reliability and efficiency of detection of the X-rayselected luminous AGN population with WISE amongst those in the literature. In the area covered by BUXS our selection identifies 2755 AGN candidates detected with signal-to-noise ratio ≥5 in the three shorter wavelength bands of WISE with 38.5 per cent having a detection at 2–10 keV X-ray energies. We also analysed the possibility of including the 22 μm WISE band to select AGN candidates, but neither the completeness nor the reliability of the selection improves. This is likely due to both the significantly shallower depth at 22 μm compared with the first three bands of WISE and star formation contributing to the 22 μm emission at the WISE 22 μm sensitivity.es_ES
dc.format.extent11 p.es_ES
dc.language.isoenges_ES
dc.publisherRoyal Astronomical Societyes_ES
dc.rights© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RASes_ES
dc.sourceMonthly Notices of the Royal Astronomical Society, Vol. 426, Iss. 4, Pag. 3271-3281, (2012)es_ES
dc.subject.otherGalaxies: activees_ES
dc.subject.otherQuasars: generales_ES
dc.subject.otherInfrared: galaxieses_ES
dc.titleUsing the Bright Ultrahard XMM–Newton survey to define an IR selection of luminous AGN based on WISE colourses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.relation.publisherVersionhttp://dx.doi.org/10.1111/j.1365-2966.2012.21843.xes_ES
dc.rights.accessRightsopenAccesses_ES
dc.identifier.DOI10.1111/j.1365-2966.2012.21843.x
dc.type.versionpublishedVersiones_ES


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record