Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasj...48..389u&link_type=abstract
Publications of the Astronomical Society of Japan, v.48, p.389-394.
Astronomy and Astrophysics
Astronomy
18
Galaxies: Active, Galaxies: Individual (Mkn 463), Galaxies: Nuclei, X-Rays: Galaxies
Scientific paper
We present the results of ASCA observations of the Seyfert galaxy Mkn 463. We find that the 1--10 keV X-ray spectrum consists of at least two components: soft and hard. We have found no evidence for a strong Fe-K fluorescent line (equivalent width <670 eV). The soft component dominates below 4 keV and has a steep slope; the 0.2--4 keV flux is consistent with that determined from Einstein observations. It would appear that this soft X-ray emission comes from a distinct thermal component. The hard component, which has been detected for the first time by ASCA, is found only above 4 keV with an apparent flat spectral slope. We argue that most of these hard X-rays are emitted directly from the nucleus of Mkn 463E, suffering a heavy absorption along our line of sight. For an assumed typical photon index of 1.7, the absorption column and intrinsic luminosity are estimated to be (1.8+/- 0.4)times 10(23) cm(-2) and 1times 10(43) erg s(-1) . This hard X-ray luminosity is much less than that expected on the basis of Mkn 463E's optical and infrared properties.
Awaki Hisamitsu
Blanco Philip R.
Hayashi Ichizo
Koyama Katsuji
Ueno Shiro
No associations
LandOfFree
Detection of Hard X-Ray Emission from MKN 463 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detection of Hard X-Ray Emission from MKN 463, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of Hard X-Ray Emission from MKN 463 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1302887