SOFT-X-RAY PROPERTIES OF THE SEYFERT-1.8 GALAXY NGC-3786

An analysis of survey and pointed ROSAT PSPC observations of the Seyfe rt 1.8 galaxy NGC 3786 has revealed interesting spectral and temporal behaviour. The spectrum is found to show clear signs of excess absorpt ion, and there is evidence that part (or al) of it is caused by the pr esence of a warm absorber. The soft X-ray spectral properties are disc ussed in the context of the Sy 1.8 classification of NGC 3786, and are combined with published optical data in an effort to discriminate bet ween several possible absorption models. The one;involving a warm abso rber with internal dust, located between BLR and NLR, is favoured and shown to account successfully for the high observed broad line reddeni ng as well as for the strong X-ray variability (a factor similar to 10 ) we detect between the 1990 and 1992 observation.