An observing campaign with 10 participating observatories has undertaken to monitor the optical brightness of the Q0957 gravitationally lensed quasar for 10...
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PublicationAround the Clock Observations of the Q0957+561A,B Gravitationally Lensed Quasar
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PublicationAround-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...
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NewsAstronomers find Milky Way analogue galaxy in the early universe
An international team, including researchers from the Instituto de Astrofísica de Canarias (IAC), used combined data from different radio telescopes located in...
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PublicationB1359+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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PublicationBlack hole masses for 14 gravitationally lensed quasars
Aims: We have estimated black hole masses (MBH) for 14 gravitationally lensed quasars using Balmer lines; we also provide estimates based on MgII and CIV...
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PublicationBrown 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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PublicationBrown 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...
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PublicationBVRI 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...
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PublicationCan 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...