78 citations · 447 across the 14 of their papers we have counts for
6 papers · 1 filter
SHARP - II. Mass structure in strong lenses is not necessarily dark matter substructure: A flux ratio anomaly from an edge-on disc
J. - W. Hsueh, C. D. Fassnacht, S. Vegetti +5
Gravitational lens flux-ratio anomalies provide a powerful technique for measuring dark matter substructure in distant galaxies. However, before using these flux-ratio anomalies to…
The brightness and spatial distributions of terrestrial radio sources
A. R. Offringa, A. G. de Bruyn, S. Zaroubi +75
Faint undetected sources of radio-frequency interference (RFI) might become visible in long radio observations when they are consistently present over time. Thereby, they might obs…
Long term Arecibo monitoring of the water megamaser in MG J0414+0534
P. Castangia, M. C. V. Impellizzeri, J. P. McKean +4
We monitored the 22 GHz maser line in the lensed quasar MG J0414+0534 at z=2.64 with the 300-m Arecibo telescope for almost two years to detect possible additional maser components…
Water vapour at high redshift: Arecibo monitoring of the megamaser in MG J0414+0534
P. Castangia, C. M. V. Impellizzeri, J. P. McKean +6
The study of water masers at cosmological distances would allow us to investigate the parsec-scale environment around powerful radio sources, to probe the physical conditions of th…
The final candidate from the JVAS/CLASS search for 6 arcsec to 15 arcsec image separation lensing
J. P. McKean
A search for 6 arcsec to 15 arcsec image separation lensing in the Jodrell Bank-Very Large Array Astrometric Survey (JVAS) and the Cosmic Lens All-Sky Survey (CLASS) by Phillips et…
A search for gravitationally lensed water masers in dusty quasars and star-forming galaxies
J. P. McKean, C. M. V. Impellizzeri, A. L. Roy +5
Luminous extragalactic water masers are known to be associated with AGN and have provided accurate estimates for the mass of the central supermassive black hole and the size and st…