NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-19 T08:52:55 PDT
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For refcode 2003A&A...408..921S:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2003A&A...408..921S Chandra LETGS and XMM-Newton observations of NGC 4593 K. C. Steenbrugge, J. S. Kaastra, A. J. Blustin, G. Branduardi-Raymont, M. Sako, E. Behar, S. M. Kahn, F. B. S. Paerels and R. Walter Received 21 January 2003 / Accepted 24 June 2003 In this paper, we analyze spectra of the Seyfert 1 galaxy NGC 4593 obtained with the Chandra Low Energy Transmission Grating Spectrometer (LETGS), the Reflection Grating Spectrometer (RGS) and the European Photon Imaging Camera's (EPIC) onboard of XMM-Newton. The two observations were separated by ~7 months. In the LETGS spectrum we detect a highly ionized warm absorber corresponding to an ionization state of 400 x 10^-9^ W m, visible as a depression at 10-18 A. This depression is formed by multiple weak Fe and Ne lines. A much smaller column density was found for the lowly ionized warm absorber, corresponding to {xi} = 3 x 10^-9^ W m. However, an intermediate ionization warm absorber is not detected. For the RGS data the ionization state is hard to constrain. The EPIC results show a narrow Fe K {alpha} line. Keywords: galaxies: active, galaxies: Seyfert, galaxies: individual: NGC 4593, X-rays: galaxies, techniques: spectroscopic
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