168 citations · 474 across the 12 of their papers we have counts for
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Optical Continuum Sources in Gravitationally Lensed Quasars
L. J. Goicoechea, D. Alcalde, V. N. Shalyapin
We review some techniques to study the nature and size of the optical continuum sources in multiple QSOs. We focus on the source originating the events with several months timescal…
Around the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar II: Results for the second observing season
Wesley N. Colley, Rudolph E. Schild, Cristina Abajas +35
We report on an observing campaign in March 2001 to monitor the brightness of the later arriving Q0957+561 B image in order to compare with the previously published brightness obse…
Determination of the properties of the central engine in microlensed QSOs
L. J. Goicoechea, D. Alcalde, E. Mediavilla +1
We study a recently observed gravitational microlensing peak in the V-band light curve of Q2237+0305A using a relatively simple, but highly consistent with the data (the best-fit r…
The nature and size of the optical continuum source in QSO 2237+0305
V. N. Shalyapin, L. J. Goicoechea, D. Alcalde +3
From the peak of a gravitational microlensing high-magnification event in the A component of QSO 2237+0305, which was accurately monitored by the GLITP collaboration, we derived ne…
A Large Brightness Enhancement of the QSO 0957+561 A Component
A. Oscoz, D. Alcalde, M. Serra-Ricart +2
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 09/2000 -- 06/2001 monitoring…
QSO 2237+0305 VR light curves from Gravitational Lenses International Time Project optical monitoring
D. Alcalde, E. Mediavilla, O. Moreau +12
We present VR observations of QSO 2237+0305 conducted by the GLITP collaboration from 1999 October 1 to 2000 February 3. The observations were made with the 2.56 m Nordic Optical T…