Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between optical and radio positions, it will be important to align the GAIA frame...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between optical and radio positions, it will be important to align the GAIA frame...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between optical and radio positions, it will be important to align the GAIA frame...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA...
Bourda, G., Charlot, P., Porcas, R., Garrington, S.
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important to align the GAIA...
A VLBI Study of the Gravitational Lens JVAS B0218+357 (2004)
Mittal, R., Porcas, R., Wucknitz, O., Biggs, A.
We present the results of phase-referenced VLBA+Effelsberg observations at five frequencies of the gravitational lens B0218+357 to establish the precise registration of the A and B lensed image...
Bradac, M., Schneider, P., Steinmetz, M., Lombardi, M., King, L., Porcas, R.
Gravitationally lensed systems with multiply imaged quasars are an excellent tool for studying the properties of distant galaxies. In particular, they provide the most accurate mass measures for the...
B1422+231: The influence of mass substructure on strong lensing (2002)
Bradac, M., Schneider, P., Steinmetz, M., Lombardi, M., King, L. J., Porcas, R.
In this work we investigate the gravitationally lensed system B1422+231. High-quality VLBI image positions, fluxes and shapes as well as an optical HST lens galaxy position are used. First, two...
B1422+231 : The influence of mass substructure on strong lensing (2002)
Bradac, M., Schneider, P., Steinmetz, M., Lombardi, M., King, L. J., Porcas, R.
In this work we investigate the gravitationally lensed system B1422+231. High-quality VLBI image positions, fluxes and shapes as well as an optical HST lens galaxy position are used. First, two...
B1422+231: The influence of mass substructure on strong lensing (2001)
Bradac, M., Schneider, P., Steinmetz, M., Lombardi, M., King, L. J., Porcas, R.
In this work we investigate the gravitationally lensed system B1422+231. High--quality VLBI image positions, fluxes and shapes as well as an optical HST lens galaxy position are used. First, two...
The core-jet structure of the JVAS gravitational lens B1030+074 (2000)
Xanthopoulos, E., Norbury, M., Karidis, A., Jackson, N., Browne, I., Wilkinson, P., ...
We present results from VLBA+Effelsberg 1.7 GHz, VLBA 8.4 GHz and VLBA 15 GHz observations of the JVAS gravitational lens system B1030+074. The VLBA+Effelsberg 1.7 GHz data with 3 mas resolution...