Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Claeskens, J."'
Autor:
Sluse, D., Eigenbrod, A., Courbin, F., Hutsemékers, D., Claeskens, J. -F., Meylan, G., Agol, E., Surdej, J.
We present the main results of the first long-term spectrophotometric monitoring of the ``Einstein cross'' Q2237+0305 and of the single-epoch spectra of the lensed quasar J1131-1231. From October 2004 to December 2006, we find that two prominent micr
Externí odkaz:
http://arxiv.org/abs/0809.2983
Thanks to its sharp view, HST has significantly improved our knowledge of tens of gravitationally lensed quasars in four different respects: (1) confirming their lensed nature; (2) detecting the lensing galaxy responsible for the image splitting; (3)
Externí odkaz:
http://arxiv.org/abs/0806.0567
We present the analysis of single epoch long slit spectra of the three brightest images of the gravitationally lensed system J1131-1231. These spectra provide one of the clearest observational evidence for differential micro-lensing of broad emission
Externí odkaz:
http://arxiv.org/abs/0801.2698
(ABRIDGED) Aims: We discuss and characterize micro-lensing among the 3 brightest lensed images (A-B-C) of the gravitational lens system RXS J1131-1231 (a quadruply imaged AGN) by means of long slit optical and NIR spectroscopy. Qualitative constraint
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703030
High angular resolution images of the complex gravitational lens system RXS J1131-1231 (a quadruply imaged AGN with a bright Einstein ring) obtained with the Advanced Camera for Surveys and NICMOS instruments onboard the Hubble Space Telescope are an
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602309
Autor:
Sluse, D., Claeskens, J. -F., Altieri, B., Cabanac, R. A., Garcet, O., Hutsemékers, D., Jean, C., Smette, A., Surdej, J.
(abridged) Aims: RXS J113155.4-123155 (z=0.66) is a quadruply imaged lensed quasar with a resolved Einstein Ring. The goal of this paper is to provide a full characterization of this system, and more particularly accurate astrometry and photometry. M
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512473
Autor:
Jordi, C., Hoeg, E., Brown, A. G. A., Lindegren, L., Bailer-Jones, C. A. L., Carrasco, J. M., Knude, J., Straizys, V., de Bruijne, J. H. J., Claeskens, J. -F., Drimmel, R., Figueras, F., Grenon, M., Kolka, I., Perryman, M. A. C., Tautvaisiene, G., Vansevicius, V., Willemsen, P. G., Bridzius, A., Evans, D. W., Fabricius, C., Fiorucci, M., Heiter, U., Kaempf, T. A., Kazlauskas, A., Kucinskas, A., Malyuto, V., Munari, U., Reyle, C., Torra, J., Vallenari, A., Zdanavicius, K., Korakitis, R., Malkov, O., Smette, A.
Publikováno v:
Mon.Not.Roy.Astron.Soc.367:290-314,2006
The European Gaia astrometry mission is due for launch in 2011. Gaia will rely on the proven principles of ESA's Hipparcos mission to create an all-sky survey of about one billion stars throughout our Galaxy and beyond, by observing all objects down
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512038
Recent OGLE (Optical Gravitational Lensing Experiment) and GLITP (Gravitational Lens International Time Project) monitoring data for QSO 2237+0305 (Huchra et al.) have been analyzed through a newly optimized N-body microlensing analysis method, the L
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503018
Autor:
Sluse, D., Surdej, J., Claeskens, J. -F., Hutsemekers, D., Jean, C., Courbin, F., Nakos, T., Billeres, M., Khmil, S. V.
Publikováno v:
Astron.Astrophys.406:L43-L46,2003
We report the discovery of a new quadruply imaged quasar surrounded by an optical Einstein ring candidate. Spectra of the different components of 1RXS J113155.4-123155 reveal a source at z=0.658. Up to now, this object is the closest known gravitatio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307345
Microlensing consists in two major effects: (1) variation in the apparent position of the background sources (astrometric component) and (2) flux variations of the background sources (photometric component). While the latter has been extensively used
Externí odkaz:
http://arxiv.org/abs/astro-ph/0108025