Zobrazeno 1 - 10
of 2 360
pro vyhledávání: '"Alcalde D."'
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 timescale (the rapid variability source) as well as the source that is respons
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210659
Publikováno v:
Astron.Astrophys. 397 (2003) 517-526
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 reduced \chi^2 is very close to 1), physical model. The source quasar i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210291
Autor:
Shalyapin, V. N., Goicoechea, L. J., Alcalde, D., Mediavilla, E., Munoz, J. A., Gil-Merino, R.
Publikováno v:
Astrophys.J. 579 (2002) 127-135
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 new information on the nature and size of the optical V-band and R-band
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207236
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 campaign (2001 observing season). The brightening is similar to or ev
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205399
Autor:
Alcalde, D., Mediavilla, E., Moreau, O., Munoz, J. A., Libbrecht, C., Goicoechea, L. J., Surdej, J., Puga, E., De Rop, Y., Barrena, R., Gil-Merino, R., McLeod, B. A., Motta, V., Oscoz, A., Serra-Ricart, M.
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 Telescope at Roque de los Muchachos Observatory, La Palma (Spain). The
Externí odkaz:
http://arxiv.org/abs/astro-ph/0204426
Autor:
Oscoz, A., Alcalde, D., Serra-Ricart, M., Mediavilla, E., Abajas, C., Barrena, R., Licandro, J., Motta, V., Munoz, J. A.
Photometric optical data of QSO 0957+561 covering the period 1984-99 are analyzed to discern between the two values of the time delay (417 and 424 days) mostly accepted in the recent literature. The observations, performed by groups from three differ
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102112
Autor:
Mediavilla, E., Motta, V., Arribas, ; S., Falco, ; E. E., Oscoz, ; A., Serra-Ricart, ; M., Alcalde, ; D., Goicoechea, ; L., Ramella, ; M., Barrena, ; R.
2D spectroscopy of Q0957+561 in the CIII]lambda1909 emission line reveals a rich variety of spatially extended features. We point out: (i) a blueshifted region apparently connecting the A and B compact images; (ii) an almost complete arc in the West
Externí odkaz:
http://arxiv.org/abs/astro-ph/9909418
Autor:
Serra-Ricart, M., Oscoz, A., Sanchis, T., Mediavilla, E., Goicoechea, L. J., Licandro, J., Alcalde, D., Gil-Merino, R.
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 telescope, at Teide Observatory, Spain, were made from the beginning of 1996 February to 1998
Externí odkaz:
http://arxiv.org/abs/astro-ph/9906193
Autor:
Hernández G; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., Quintero E; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain.; Departamento de Medicina Interna, Instituto Universitario de Tecnologías Biomédicas (ITB) & Centro de Investigación Biomédica de Canarias (CIBICAN), Universidad de La Laguna, San Cristóbal de La Laguna, Spain., Morales-Arraez D; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., García Rayado G; Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain., Hijos-Mallada G; Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain., Fernández-Fernández N; Hospital Álvaro Cunqueiro de Vigo, Pontevedra, Spain., de Castro-Parga L; Complejo Hospitalario Universitario de Vigo, Vigo, Spain., Álvarez-Sánchez MV; Complejo Hospitalario Universitario de Pontevedra, Pontevedra, Spain., Olano C; Clínica de Gastroenterología. Facultad de Medicina, Montevideo, Uruguay., Rodríguez-Alcalde D; Hospital Universitario de Móstoles, Madrid, Spain., Amaral-González C; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., Alonso-Abreu I; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., Nicolás-Pérez D; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., Carrillo-Palau M; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain., González-Dávila E; Departamento de Matemáticas, Estadística e Investigación Operativa, Instituto IMAULL, Universidad de La Laguna, San Cristóbal de La Laguna, Spain., Gimeno-García AZ; Servicio de Aparato Digestivo, Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain.
Publikováno v:
Frontiers in medicine [Front Med (Lausanne)] 2024 Jun 25; Vol. 11, pp. 1407812. Date of Electronic Publication: 2024 Jun 25 (Print Publication: 2024).
