Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Xanthopoulos, E"'
High resolution MERLIN 5 GHz observations (0.04") of 7 Seyfert galaxies, selected as the ones previously showing evidence of collimated ejection, have been compared with high resolution archive HST data. The radio maps reveal rich structures in all t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603549
Using the final version of the VLA FIRST survey (Becker et al. 2003), the optical Sloan Digital Sky Survey Data Release 3 (DR3) quasar list and a series of carefully selected criteria, we have defined the largest homogeneous population of double-lobe
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603548
Autor:
Browne, I. W. A., Wilkinson, P. N., Jackson, N. J. F., Myers, S. T., Fassnacht, C. D., Koopmans, L. V. E., Marlow, D. R., Norbury, M., Rusin, D., Sykes, C. M., Biggs, A. D., Blandford, R. D., de Bruyn, A. G., Chae, K-H., Helbig, P., King, L. J., McKean, J. P., Pearson, T. J., Phillips, P. M., Readhead, A. C. S., Xanthopoulos, E., York, T.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 341 (2003) 13
We report the final results of the search for gravitationally lensed flat-spectrum radio sources found in the combination of CLASS (Cosmic Lens All Sky Survey) and JVAS (Jodrell-Bank VLA Astrometric Survey). VLA observations of 16,503 sources have be
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211069
Autor:
Chae, K. -H., Biggs, A. D., Blandford, R. D., Browne, I. W. A., de Bruyn, A. G., Fassnacht, C. D., Helbig, P., Jackson, N. J., King, L. J., Koopmans, L. V. E., Mao, S., Marlow, D. R., McKean, J. P., Myers, S. T., Norbury, M., Pearson, T. J., Phillips, P. M., Readhead, A. C. S., Rusin, D., Sykes, C. M., Wilkinson, P. N., Xanthopoulos, E., York, T.
Publikováno v:
Phys.Rev.Lett. 89 (2002) 151301
We derive constraints on cosmological parameters and the properties of the lensing galaxies from gravitational lens statistics based on the final Cosmic Lens All Sky Survey (CLASS) data. For a flat universe with a classical cosmological constant, we
Externí odkaz:
http://arxiv.org/abs/astro-ph/0209602
Publikováno v:
Astrophys.J. 581 (2002) 823-835
The gravitational lens CLASS B1608+656 is the only four-image lens system for which all three independent time delays have been measured. This makes the system an excellent candidate for a high-quality determination of H_0 at cosmological distances.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0208420
We present MERLIN L-band images of the compact galaxy group, Stephan's Quintet. The Seyfert 2 galaxy, NGC 7319, the brightest member of the compact group, is seen to have a triple radio structure typical of many extra-galactic radio sources which hav
Externí odkaz:
http://arxiv.org/abs/astro-ph/0202332
Autor:
Castro-Tirado, A. J., Sokolov, V. V., Gorosabel, J., Cerón, J. M. Castro, Greiner, J., Wijers, R. A. M. J., Jensen, B. L., Hjorth, J., Toft, S., Pedersen, H., Palazzi, E., Pian, E., Masetti, N., Sagar, R., Mohan, V., Pandey, A. K., Pandey, S. B., Dodonov, S. N., Fatkhullin, T. A., Afanasiev, V. L., Komarova, V. N., Moiseev, A. V., Hudec, R., Simon, V., Vreeswijk, P., Rol, E., Klose, S., Stecklum, B., Zapatero-Osorio, M. R., Caon, N., Blake, C., Wall, J., Heinlein, D., Henden, A., Benetti, S., Magazzu, A., Ghinassi, F., Tommasi, L., Bremer, M., Kouveliotou, C., Guziy, S., Shlyapnikov, A., Hopp, U., Feulner, G., Dreizler, S., Hartmann, D., Boehnhardt, H., Paredes, J. M., Marti, J., Xanthopoulos, E., Kristen, H. E., Smoker, J., Hurley, H.
Publikováno v:
Astron.Astrophys. 370 (2001) 398-406
Observations of the extraordinarily bright optical afterglow (OA) of GRB 991208 started 2.1 d after the event. The flux decay constant of the OA in the R-band is -2.30 +/- 0.07 up to 5 d, which is very likely due to the jet effect, and after that it
Externí odkaz:
http://arxiv.org/abs/astro-ph/0102177
Autor:
Xanthopoulos, E., Richards, A. M. S.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 326 (2001) L37
MERLIN images of Mrk 348 at 22 GHz show water maser emission at 0.02 - 0.11 Jy, within approximately 0.8 pc of the nucleus. This is the first direct confirmation that molecular material exists close to the Seyfert 2 nucleus. Mrk 348 was observed in 2
Externí odkaz:
http://arxiv.org/abs/astro-ph/0012397
We present VLA and MERLIN monitoring data of the JVAS gravitational lens system B1030+074. The system was monitored with the VLA from February 1998 to October 1998 at 8.4-GHz during which the VLA was at its A, BnA and B configuration. The 47 epochs o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0012373
Publikováno v:
Mon.Not.Roy.Astron.Soc. 325 (2001) 273
We have searched for molecular absorption lines at millimeter wavelengths in eleven gravitational lens systems discovered in the JVAS/CLASS surveys of flat spectrum radio sources. Spectra of only one source 1030+074 were obtained in the 3-, 2- and 1.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010454