Multifrequency Monitoring of the Blazar PKS 2005-489

We present a multifrequency monitoring campaign of PKS 2005-489, a bright and highly variable blazar. Simultaneous observations were completed over a 13 day period in the X-ray with RXTE, in the optical at the CTIO 0.9m telescope, at TeV energies with CANGAROO-II, and at submillimetre wavelengths with SEST. Previous multiwavelength monitoring campaigns of PKS 2005-489 and other blazars have found complex flux and spectral variability behaviour, with different modes and timescales from days to hours and shorter. PKS 2005-489 was observed in transition from a quiescent state into the early stages of a flare. A gradual increase in flux density was observed at optical and X-ray wavelengths during 19-27 August 2000, and a dramatic increase in X-ray emission was observed starting on 2 September 2000. Intraday and spectral variability were not detected during the campaign.