Multiwavelength Monitoring of LS 5039

We propose to continue weekly flux monitoring at 13cm, 6cm, and 3cm of the unusual radio/X-ray/gamma-ray bright high mass X-ray binary LS 5039. The nature of this source is unclear, but it is most likely a pulsar enshrouded by the wind of its O star companion, making it similar to PSR B1259-63 near periastron. This will complement our weekly monitoring of the source in X-rays by RXTE during its last cycle of operations (until Sept. 2009) and our optical spectroscopy monitoring with CTIO. Combined with ongoing gamma-ray observations by AGILE, GLAST, and HESS, this provides a unique opportunity to monitor the flux of this source across the entire spectrum.