Výsledky vyhledávání - "Ullán, Aurora"

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The dark halo of the main lens galaxy in QSO 0957+561

Autor: Goicoechea, Luis J., Gil-Merino, Rodrigo, Ullan, Aurora

We present an analysis of infrared/optical/ultraviolet spectra of the two images of the first gravitationally lensed quasar Q0957+561A, B. The Hubble Space Telescope observations of Q0957+561A and Q0957+561B are separated in time by the known time de

Externí odkaz: http://arxiv.org/abs/astro-ph/0503610

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GLITP Optical Monitoring of QSO 0957+561: VR Light Curves and Variability

Autor: Ullan, Aurora, Goicoechea, Luis J., Munoz, Jose A., Mediavilla, Evencio, Serra-Ricart, Miquel, Puga, Elena, Alcalde, David, Oscoz, Alex, Barrena, Rafael

Publikováno v: Mon.Not.Roy.Astron.Soc.346:415,2003

The GLITP collaboration observed the first gravitational lens system (QSO 0957+561) from 2000 February 3 to 2000 March 31. The daily VR observations were made with the 2.56-m Nordic Optical Telescope at Roque de los Muchachos Observatory, La Palma (S

Externí odkaz: http://arxiv.org/abs/astro-ph/0309046

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Around the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar II: Results for the second observing season

Publikováno v: Astrophys.J.587:71-79,2003

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 observations of the (first arriving) A image. The 12 participating observa

Externí odkaz: http://arxiv.org/abs/astro-ph/0210400

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