The MRK 421 Multiwavelength Campaign: EUVE Observation

A. Fruscione (1), F. Bruhweiler, K.P. Cheng (1), C.R. Hall, M. Kafatos, E. Ramos, Y. Kondo

1) Center for EUV Astrophysics, 2150 Kittredge St., University of California Berkeley, Ca. 94720-5030
2) Code 684, Goddard Space Flight Center, Greenbelt, MD 20771

Presented at the 11th Colloquium on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, Nagoya, Japan, May 29 - June 2, 1995

Abstract

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.

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