Proposal code

w051

Proposal title

VSOP OBSERVATIONS OF THE GRAVITATIONAL LENS SYSTEM 1030+074

The

Investigators and their

Affiliations

P.I. R W. Porcas MPIfR, Bonn, GERMANY
E. Xanthopoulos, I.W.A Browne, P.N.Wilkinson NRAL Jodrell Bank, Uni. Manchester, UK
A.R. Patnaik MPIfR, Bonn, GERMANY

Proposal Abstract

B1030+074 is a new, double-image gravitational lens system, discovered during the course of the Jodrell Bank - VLA Astrometric Survey, with a separation of 1.56 arcsecs between its images. Both the source and lens galaxy redshifts are know, and as there is evidence for radio variability, it seems a promising candidate for measuring the Hubble constant. VLBA 5 GHz maps reveal a core-jet structure in the stronger image, but nothing in the other, which is 16 times weaker and hence must be much smaller. We request VSOP observations at both 5 GHz and 1.6 GHz in order to search for the core-jet structure that should be present in the weaker image. Comparison of the two image structures will provide valuable constraints on the lens mass model.

The full Cover Sheets (compressed post-script, typically 50kbytes) can be retrieved. Note that many proposals were reduced in extent by the Scientific Review Committee (e.g. by reducing the number of experiments), however the Cover Sheets contain the full proposal as submitted. Also note that AO2 proposals were submitted in May 1998, and information such as affiliations and contact details has changed for some proposers since that time. The Cover Sheets (and the details on this page, which were derived from the Cover Sheets) may therefore have changed.