X-Ray Observations of NGC 2110 with GINGA and ASCA

Details X-Ray Observations of NGC 2110 with GINGA and ASCA X-Ray Observations of NGC 2110 with GINGA and ASCA

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasj...48..219h&link_type=abstract

Publications of the Astronomical Society of Japan, v.48, p.219-229.

Astronomy and Astrophysics

Astronomy

22

Galaxies: Individual (Ngc 2110), Galaxies: Seyfert, Galaxies: X-Ra Ys

Scientific paper

We present the Ginga and ASCA results for the narrow emission line galaxy NGC 2 110. 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 w as 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 reflecti on process is not dominant in NGC 2110. We propose that these iron line and edge f eatures are due to a partial covering material with N_H ~ 10(23) cm(-2) , wh ich presumably comprises ``hidden'' broad line region (BLR) clouds.

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