2 papers
astro-ph2000
Point source models for the gravitational lens B1608+656: Indeterminacy in the prediction of the Hubble constant
Gabriela Surpi, Roger Blandford
We apply elliptical isothermal mass models to reproduce the point source properties, i.e. image positions, flux density ratios and time delay ratios, of the quadruple lens B1608+65…
astro-ph2000
Modeling Galaxy Lenses
Roger Blandford, Gabriela Surpi, Tomislav Kundic
In order to use a gravitational lens to measure the Hubble constant accurately, it is necessary to derive a reliable model of the lens surface potential. If the analysis is restric…