Modeling the ten-image lensed system B1933+503

Abstract

A gravitational lens model is presented for the newly discovered 10-image system B1933+503. The underlying object, revealed by modeling, is a triple radio source on the scale of a couple of hundred mas that is well-aligned along the line of sight with a foreground and somewhat flattened lensing galaxy, whose orientation and location match that of an observed galaxy, known to be at a redshift of 0.755. Uncertainties in the modeling are obtained by a Monte Carlo exercise. Observational tests of the lens model are proposed, and the time delays between various pairs of images are determined as the core of the source is known to be significantly variable. Future observations of the lens hold the key to using B1933+503 to constrain Hubble's Constant. Despite the absence of a source redshift, the system's utility as a probe of the lens galaxy's structure is unparalleled as it provides a surfeit of easily identifiable constraints for modeling the system.

11 pages (accepted for publication by the MNRAS) (correction: footnote regarding Kassiola & Kovner (1993) deleted as unnecessary)

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