CONTEMPORANEOUS IUE, EUVE, AND HIGH-ENERGY OBSERVATIONS OF 3C-273

We present the results of our 1994 January and 1995 January observatio ns of the quasar 3C 273 obtained with the International Ultraviolet Ex plorer (IUE) and the Extreme-Ultraviolet Explorer (EUVE). These observ ations were part of a large multiwavelength campaign to observe 3C 273 from radio through gamma-rays. Our 1995 January photometric observati ons with the EUVE Lexan/B Deep Survey (DS) instrument indicate strong evidence for variability, at a 99% confidence level, during the 12 day observing period. We have utilized ROSAT PSPC soft X-ray power-law mo dels to correlate with EUVE count rates. Besides variations in the nor malization level between both observations, our EUV count rates are co nsistent with a simple power-law model with spectral index alpha simil ar to 1.77 (F-v similar to v(-alpha)) that can be extrapolated from th e soft X-rays to the EUV range. The active galactic nucleus 3C 273 is an important blazar to study because in our picture it reveals the pre sence of both disk and relativistic beam spectral contributions.