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S. Vennes, E. Polomski, S. Bowyer, J.R. Thorstensen
We report the detection of intense EUV radiation from the Seyfert 1 galaxy Ton S180. The source EUVE J0057-223, discovered in the Extreme Ultraviolet Explorer all-sky survey, is only 25" away from its optical counterpart, well within the position error circle. We present a complete broad-band energy distribution of Ton S180 using infrared (IRAS), optical, ultraviolet (IUE), and X-ray (ROSAT) flux measurements, and we find that the measured EUV flux, corrected for neutral hydrogen and helium absorption in the Galaxy, suggests the presence of a strong EUV to soft X-ray flux excess. We briefly discuss the implications for models of active galaxies.
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