The MRK 421 Multi-Wavelength Campaign: EUVE Observation

We present the extreme ultraviolet (EUV) spectrum and light curve of the BL Lacertae object Markarian 421, obtained with the Extreme Ultraviolet Explorer (EUVE). The EUVE observation was part of a large multiwavelength campaign covering radio to gamma-ray energies. Preliminary analysis of the EUV spectrum indicates a smooth continuum in the 75-115 A range with no evidence of absorption features. The light curve shows variability of up to factors of two on a time-scale of a few days.