Astrophysical: Gravitational lensing

  • Talk
    Observing the polarized microwave sky: 10 years of the QUIJOTE experiment

    I will review the status of the QUIJOTE (Q-U-I JOint TEnerife) experiment, a project led from the IAC with the aim of characterising the polarisation of the...

  • Publication
    A Fast and Very Accurate Approach to the Computation of Microlensing Magnification Patterns Based on Inverse Polygon Mapping

    A new method of calculating microlensing magnification patterns is proposed that is based on the properties of the backward gravitational lens mapping of a...

  • Publication
    A high-resolution investigation of the multiphase ISM in a galaxy during the first two billion years

    We have carried out the first spatially resolved investigation of the multiphase interstellar medium (ISM) at high redshift, using the z = 4.24 strongly lensed...

  • Publication
    A Large Brightness Enhancement of the QSO 0957+561 A Component

    We report an increase of more than 0.2 mag in the optical brightness of the leading image (A) of the gravitational lens Q0957+561, detected during the 2000...

  • Publication
    A Mass Model for the Lensing Cluster SDSS J1004+4112: Constraints from the Third Time Delay

    We have built a new model for the lens system SDSS J1004+4112 including the recently measured time delay of the fourth quasar image. This time delay has a...

  • Publication
    A New Einstein Cross Gravitational Lens of a Lyman-break Galaxy

    We report the study of an “Einstein Cross” configuration first identified in a set of HST images by Cerny et al. Deep spectroscopic observations obtained at the...

  • Publication
    A new VLA/e-MERLIN limit on central images in the gravitational lens system CLASS B1030+074

    We present the new Very Large Array 22 GHz and extended Multi-Element Remote-Linked Interferometer Network 5 GHz observations of CLASS B1030+074, a two-image...

  • Publication
    A Planetary Microlensing Event with an Unusually Red Source Star: MOA-2011-BLG-291

    We present the analysis of the planetary microlensing event MOA-2011-BLG-291, which has a mass ratio of q = (3.8 ± 0.7) × 10‑4 and a source star that is redder...

  • Publication
    A Robust Determination of the Size of Quasar Accretion Disks Using Gravitational Microlensing

    Using microlensing measurements for a sample of 27 image pairs of 19 lensed quasars we determine a maximum likelihood estimate for the accretion disk size of an...