A Gravitationally lensed quasar discovered in OGLE

Zuzanna Kostrzewa-Rutkowska, Szymon Kozlowski, Cameron Lemon, T. Anguita, J. Greiner, M. W. Auger, L. Wyrzykowski, Y. Apostolovski, J. Bolmer, A. Udalski, M. K. Szymański, I. Soszyński, R. Poleski, P. Pietrukowicz, J. Skowron, P. Mróz, K. Ulaczyk, M. Pawlak

Resultado de la investigación: Article

  • 2 Citas

Resumen

We 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).

IdiomaEnglish
Páginas663-672
Número de páginas10
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen476
Número de edición1
DOI
EstadoPublished - 1 may 2018

Huella dactilar

quasars
experiment
spectral energy distribution
time lag
lenses
Wide-field Infrared Survey Explorer
galaxies
gravitational lenses
Magellanic clouds
stellar mass
energy
sky
telescopes
estimates

Keywords

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Citar esto

    Kostrzewa-Rutkowska, Z., Kozlowski, S., Lemon, C., Anguita, T., Greiner, J., Auger, M. W., ... Pawlak, M. (2018). A Gravitationally lensed quasar discovered in OGLE. Monthly Notices of the Royal Astronomical Society, 476(1), 663-672. https://doi.org/10.1093/mnras/sty259
    Kostrzewa-Rutkowska, Zuzanna ; Kozlowski, Szymon ; Lemon, Cameron ; Anguita, T. ; Greiner, J. ; Auger, M. W. ; Wyrzykowski, L. ; Apostolovski, Y. ; Bolmer, J. ; Udalski, A. ; Szymański, M. K. ; Soszyński, I. ; Poleski, R. ; Pietrukowicz, P. ; Skowron, J. ; Mróz, P. ; Ulaczyk, K. ; Pawlak, M. / A Gravitationally lensed quasar discovered in OGLE. En: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 476, N.º 1. pp. 663-672.
    @article{cca6768dca6f4ae59ef21939a979109f,
    title = "A Gravitationally lensed quasar discovered in OGLE",
    abstract = "We 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).",
    keywords = "Gravitational lensing: Strong, Methods: Observational, Quasars: General",
    author = "Zuzanna Kostrzewa-Rutkowska and Szymon Kozlowski and Cameron Lemon and T. Anguita and J. Greiner and Auger, {M. W.} and L. Wyrzykowski and Y. Apostolovski and J. Bolmer and A. Udalski and Szymański, {M. K.} and I. Soszyński and R. Poleski and P. Pietrukowicz and J. Skowron and P. Mr{\'o}z and K. Ulaczyk and M. Pawlak",
    year = "2018",
    month = "5",
    day = "1",
    doi = "10.1093/mnras/sty259",
    language = "English",
    volume = "476",
    pages = "663--672",
    journal = "Monthly Notices of the Royal Astronomical Society",
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    Kostrzewa-Rutkowska, Z, Kozlowski, S, Lemon, C, Anguita, T, Greiner, J, Auger, MW, Wyrzykowski, L, Apostolovski, Y, Bolmer, J, Udalski, A, Szymański, MK, Soszyński, I, Poleski, R, Pietrukowicz, P, Skowron, J, Mróz, P, Ulaczyk, K & Pawlak, M 2018, 'A Gravitationally lensed quasar discovered in OGLE' Monthly Notices of the Royal Astronomical Society, vol. 476, n.º 1, pp. 663-672. https://doi.org/10.1093/mnras/sty259

    A Gravitationally lensed quasar discovered in OGLE. / Kostrzewa-Rutkowska, Zuzanna; Kozlowski, Szymon; Lemon, Cameron; Anguita, T.; Greiner, J.; Auger, M. W.; Wyrzykowski, L.; Apostolovski, Y.; Bolmer, J.; Udalski, A.; Szymański, M. K.; Soszyński, I.; Poleski, R.; Pietrukowicz, P.; Skowron, J.; Mróz, P.; Ulaczyk, K.; Pawlak, M.

    En: Monthly Notices of the Royal Astronomical Society, Vol. 476, N.º 1, 01.05.2018, p. 663-672.

    Resultado de la investigación: Article

    TY - JOUR

    T1 - A Gravitationally lensed quasar discovered in OGLE

    AU - Kostrzewa-Rutkowska, Zuzanna

    AU - Kozlowski, Szymon

    AU - Lemon, Cameron

    AU - Anguita, T.

    AU - Greiner, J.

    AU - Auger, M. W.

    AU - Wyrzykowski, L.

    AU - Apostolovski, Y.

    AU - Bolmer, J.

    AU - Udalski, A.

    AU - Szymański, M. K.

    AU - Soszyński, I.

    AU - Poleski, R.

    AU - Pietrukowicz, P.

    AU - Skowron, J.

    AU - Mróz, P.

    AU - Ulaczyk, K.

    AU - Pawlak, M.

    PY - 2018/5/1

    Y1 - 2018/5/1

    N2 - We 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).

    AB - We 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).

    KW - Gravitational lensing: Strong

    KW - Methods: Observational

    KW - Quasars: General

    UR - http://www.scopus.com/inward/record.url?scp=85043538715&partnerID=8YFLogxK

    U2 - 10.1093/mnras/sty259

    DO - 10.1093/mnras/sty259

    M3 - Article

    VL - 476

    SP - 663

    EP - 672

    JO - Monthly Notices of the Royal Astronomical Society

    T2 - Monthly Notices of the Royal Astronomical Society

    JF - Monthly Notices of the Royal Astronomical Society

    SN - 0035-8711

    IS - 1

    ER -

    Kostrzewa-Rutkowska Z, Kozlowski S, Lemon C, Anguita T, Greiner J, Auger MW y otros. A Gravitationally lensed quasar discovered in OGLE. Monthly Notices of the Royal Astronomical Society. 2018 may 1;476(1):663-672. https://doi.org/10.1093/mnras/sty259