We present results of the ASCA observation of the Seyfert 2 galaxy NGC 4507. The 0.5-10 keV spectrum is rather complex and consists of several components: (i) a hard X-ray power law heavily absorbed by a column density of about 3 × 1023 cm-2, (ii) a narrow Fe Kχ line at 6.4 keV, (iii) soft continuum emission well above the extrapolation of the absorbed hard power law and (iv) a narrow emission line at ∼0.9keV. The line energy, consistent with highly ionized neon (Ne ix), may indicate that the soft X-ray emission is derived from a combination of resonant scattering and fluorescence in a photoionized gas. Some contribution to the soft X-ray spectrum from thermal emission, as a blend of Fe L lines, by a starburst component in the host galaxy cannot be ruled out with the present data.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 1998
- galaxies: active - galaxies: individual: NGC 4507 - galaxies: Seyfert - X-rays: galaxies;
- 8 pages, LateX, 5 figures (included). Uses mn.sty and epsfig.sty. To appear in MNRAS