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[84.01] A turn of the screw: three months of imaging SS433 with the VLA

M.P. Rupen, A.J. Mioduszewski (NRAO)

We present preliminary results of a summer 2003 campaign of imaging the relativistic Galactic jet source SS433 with the Very Large Array (VLA). With weekly observations at six frequencies spanning the entirety of the high-resolution A configuration (~3 months), these observations provide the first fully-sampled VLA imaging sequence for this source, over half of the ~163 day precession period. The primary goals of this work are, first, to measure the evolution of the overall jet morphology and hence obtain improved constraints on the precessing jet model and the distance to the source; and second, to reliably track the flux density, spectral index, and polarization evolution, as well as the proper motions, of individual jet features, over a large fraction of their lives. This VLA imaging sequence overlaps the parallel VLBA campaign, the first results of which are also presented at this meeting (Mioduszewski et al.).

The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

The author(s) of this abstract have provided an email address for comments about the abstract: mrupen@nrao.edu

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.