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Chandra LETGS and XMM-Newton observations of NGC 4593

Steenbrugge, K. C. and Kaastra, J. S. and Blustin, A. J. and Branduardi-Raymont, G. and Sako, M. and Behar, E. and Kahn, S. M. and Paerels, F. B. S. and Walters, R. (2003) Chandra LETGS and XMM-Newton observations of NGC 4593. Astronomy & Astrophysics, 408 (3). pp. 921-928. ISSN 0004-6361. doi:10.1051/0004-6361:20031021.

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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 Å. 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 ξ = 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 Kα line.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kaastra, J. S.0000-0001-5540-2822
Walters, R.0000-0002-1835-6078
Additional Information:© 2003 ESO. Received: 21 January 2003. Accepted: 24 June 2003. This work is based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). SRON National Institute for Space Research is supported financially by NWO, The Netherlands Organization for Scientific Research. The MSSL authors acknowledge the support of PPARC. EB was supported by the Yigal-Alon Fellowship and by the GIF Foundation under grant #2028-1093.7/2001. KCS expresses gratitude for the hospitality of the Columbia Astrophysics Laboratory during her two months visit. The authors thank Chris Saunders for his contribution to early analysis of the XMM-Newton data.
Group:TAPIR, Space Radiation Laboratory
Funding AgencyGrant Number
European Space Agency (ESA)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Yigal-Alon FellowshipUNSPECIFIED
German-Israeli Foundation for Research and Development2028-1093.7/2001
Subject Keywords:galaxies: active - galaxies: Seyfert - galaxies: individual: NGC 4593 - X-rays: galaxies - techniques: spectroscopic
Issue or Number:3
Record Number:CaltechAUTHORS:20180309-131727767
Persistent URL:
Official Citation: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 A&A, 408 3 (2003) 921-928 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85231
Deposited By: Ruth Sustaita
Deposited On:09 Mar 2018 21:51
Last Modified:15 Nov 2021 20:26

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