X-ray observations of NGC 2110 with Ginga and ASCA

We present the Ginga and ASCA results for the narrow emission line galaxy NGC 2110. Using Ginga data we found a fast time-variability of a few hours, superimposed on a relatively constant X-ray flux. The X-ray spectrum was well fitted with an absorbed power-law plus iron K emission-line model, in which no significant reflection component was required. Using ASCA data we confirmed the previous detection of extra soft X-ray emission and a K-shell emission line from ''cold'' iron in the simple absorbed power-law spectrum. For the first time we detected a K-shell absorption edge of ''cold'' iron. This edge feature, combined with the Ginga results, indicates that the reflection process is not dominant in NGC 2110. We propose that these iron line and edge features are due to a partial covering material with N-H similar to 10(23) cm(-2), which presumably comprises ''hidden'' broad line region (BLR) clouds.