A RESONANT ABSORPTION-LINE IN THE ASCA SPECTRUM OF NGC-985

We present timing and spectral analyses of the ASCA observation of the Seyfert 1 galaxy NGC 985. The 0.6-10 keV spectrum of this source is c omplex: large residuals are evident below 1 keV when fitting the spect rum with a power-lam model. Fitting a warm absorber model to the 0.6-2 .5 keV spectrum gives alpha = 1.12 +/- 0.04, LogN(H)(WA) = 21.97 +/- 0 .08 and LogU= 0.06 +/- 0.09, but the residuals continue to show a defi cit of counts between 0.9 and 1 keV. Adding an absorption line improve s the fit, and the energy of the line is consistent with that of K alp ha NeIX-X resonant absorption lines. Hence, we confirm the presence of an ionized absorber along the line of sight to this source and interp ret the further 1 keV spectral feature as the first detection of a str ong resonant absorption line associated with this system. The extrapol ation of this model above 2.5 keV produces large positive residuals ab ove 3-4 keV. Fitting the data with a broken power law plus warm absorb er model gives an acceptable chi(2) and Delta alpha similar to 0.5 A n arrow iron line at 6.4 keV (quasar frame) of equivalent width 138(-110 )(+64) eV is also present in the ASCA data.