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   PR # 42159
   Recent ROSAT observations of Narrow Line Seyfert 1s find a very steep
   soft spectrum and rapid variability. It has been suggested that these
   properties result from an extreme value of a yet unknown physical
   parameter; a high accretion rate or low black hole mass have been
   suggested. We propose a 50ks ASCA observation of one of the brightest
   NLS1s TonS180. Coordinated EUVE and optical observations are also
   being proposed. TonS180 is bright enough that excellent spectral and
   variability constraints are possible, allowing direct tests of models
   for the hard X-ray emission and optical-UV-soft X-ray excess.
   Comparison with results from ordinary Seyfert 1s will help us
   understand how and why they are different and contribute to our
   understanding of the Seyfert 1 phenomenon.
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