Proposal code
w052
Proposal title
Second epoch Space-VLBI astrometry on the quasars 1038+52A,B
The |
Investigators and their |
Affiliations |
| P.I. |
M.J.Rioja |
Istituto di Radioastronomia, Bologna, ITALY |
| |
R.W.Porcas |
MPIfR, Bonn, GERMANY |
Proposal Abstract
The pair of quasars 1038+528 A and B, separated by 33'', has been monitored
for nearly 15 years with dual frequency ground-VLBI.
Although their small separation permits precise relative astrometry
at the micro-as level, an interpretation of changes in
terms of time and frequency variations in source structure is limited by
the interferometer beam size. Space VLBI offers a unique chance to improve
the map resolution and allow a more precise interpretation of these variations,
and we have succeeded in producing a VSOP phase
referenced map of quasar B from 1.6 GHz observations in Nov 1997.
We now propose second epoch
observations at 1.6 and 5 GHz.
Although orbit uncertainties prevent us improving on ground VLBI astrometric
precisions, we hope to map any source structure changes at both frequencies,
and to detect any change or "jitter" in the A and B source positions
at 1.6 and 5 GHz using Space-VLBI relative astrometry.
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details on this page, which were derived from the Cover Sheets) may
therefore have changed.