Astrofísicas: Lente gravitacional

  • Publicación
    Apparent correlation between extrinsic and intrinsic flux variations in the first gravitationally lensed quasar
    To better understand which sources contribute to optical passband fluxes of Q0957+561, we present and analyse light curves of the doubly imaged gravitationally...
  • Publicación
    Around the Clock Observations of the Q0957+561A,B Gravitationally Lensed Quasar
    An observing campaign with 10 participating observatories has undertaken to monitor the optical brightness of the Q0957 gravitationally lensed quasar for 10...
  • Publicación
    Around-the-Clock Observations of the Q0957+561A,B Gravitationally Lensed Quasar. II. Results for the Second Observing Season
    We report on an observing campaign in 2001 March to monitor the brightness of the later arriving Q0957+561B image in order to compare with the previously...
  • Publicación
    B1359+154: A Six-Image Lens Produced by a z ~= 1 Compact Group of Galaxies
    Hubble Space Telescope (HST) V- and I-band observations show that the gravitational lens B1359+154 consists of six images of a single zs=3.235 radio source and...
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    Black hole masses for 14 gravitationally lensed quasars
    Aims: We have estimated black hole masses (M BH) for 14 gravitationally lensed quasars using Balmer lines; we also provide estimates based on MgII and CIV...
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    Brown dwarf companions in binaries detected in the 2021 season high-cadence microlensing surveys
    Aims: As a part of the project aiming to build a homogeneous sample of binary-lens (2L1S) events containing brown dwarf (BD) companions, we investigate the 2021...
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    Brown dwarf companions in microlensing binaries detected during the 2016-2018 seasons
    Aims: With the aim of finding microlensing binaries containing brown dwarf (BD) companions, we investigate the microlensing survey data collected during the...
  • Publicación
    BVRI Photometry of QSO 0957+561A, B: Observations, New Reduction Method, and Time Delay
    CCD observations of the gravitational lens system Q0957+561A, B in the BVRI bands are presented in this paper. The observations, taken with the 82 cm IAC-80...
  • Publicación
    Can Jupiters be found by monitoring Galactic bulge microlensing events from northern sites?
    In 1998 the EXPORT team monitored microlensing event light curves using a charge-coupled device (CCD) camera on the IACQ4 0.8-m telescope on Tenerife to...