A gravitationally lensed quasar discovered in OGLE

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dc.contributor.authorKostrzewa-Rutkowska, Z.
dc.contributor.authorKozlowski, S.
dc.contributor.authorLemon, C.
dc.contributor.authorAnguita, T.
dc.contributor.authorGreiner, J.
dc.contributor.authorAuger, M.W.
dc.contributor.authorWyrzykowski, L.
dc.contributor.authorApostolovski, Y.
dc.contributor.authorBolmer, J.
dc.contributor.authorUdalski, A.
dc.contributor.authorSzymański, M.K.
dc.contributor.authorSoszyński, I.
dc.contributor.authorPoleski, R.
dc.contributor.authorPietrukowicz, P.
dc.contributor.authorSkowron, J.
dc.contributor.authorMróz, P.
dc.contributor.authorUlaczyk, K.
dc.contributor.authorPawlak, M.
dc.date.accessioned2018-09-24T19:10:23Z
dc.date.available2018-09-24T19:10:23Z
dc.date.issued2018-05
dc.descriptionIndexación: Scopus; Web of Science.es_ES
dc.description.abstractWe report the discovery of a new gravitationally lensed quasar (double) from the Optical Gravitational Lensing Experiment (OGLE) identified inside the ~670deg2 area encompassing the Magellanic Clouds. The source was selected as one of ~60 'red W1-W2' mid-infrared objects from WISE and having a significant amount of variability in OGLE for both two (or more) nearby sources. This is the first detection of a gravitational lens, where the discovery is made 'the other way around', meaning we first measured the time delay between the two lensed quasar images of -132 < tAB < -76 d (90 per cent CL), with the median tAB ~-102 d (in the observer frame), and where the fainter image B lags image A. The system consists of the two quasar images separated by 1.5 arcsec on the sky, with I ~20.0mag and I ~19.6mag, respectively, and a lensing galaxy that becomes detectable as I ~21.5 mag source, 1.0 arcsec from image A, after subtracting the two lensed images. Both quasar images show clear AGN broad emission lines at z=2.16 in the New Technology Telescope spectra. The spectral energy distribution (SED) fitting with the fixed source redshift provided the estimate of the lensing galaxy redshift of z ~0.9 ± 0.2 (90 per cent CL), while its type is more likely to be elliptical (the SED-inferred and lens-model stellar mass is more likely present in ellipticals) than spiral (preferred redshift by the lens model). © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.es_ES
dc.description.urihttps://academic.oup.com/mnras/article/476/1/663/4833689
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 476(1), pp. 663-672.es_ES
dc.identifier.issn0035-8711
dc.identifier.otherDOI: 10.1093/mnras/sty259
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/7043
dc.language.isoenes_ES
dc.publisherOxford University Presses_ES
dc.subjectGravitational lensing: Stronges_ES
dc.subjectMethods: Observationales_ES
dc.subjectQuasars: Generales_ES
dc.titleA gravitationally lensed quasar discovered in OGLEes_ES
dc.typeArtículoes_ES
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