Chandra LETGS and XMM-Newton observations of NGC 4593
Abstract
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.
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.Attached Files
Published - aah4257.pdf
Submitted - 0306336.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:94ed3fdab98b3ec5c2990a622f2fd59d
|
373.6 kB | Preview Download |
|
md5:5a5ff5246ee65b8b75507b3144b08da7
|
391.7 kB | Preview Download |
Additional details
- Eprint ID
- 85231
- Resolver ID
- CaltechAUTHORS:20180309-131727767
- European Space Agency (ESA)
- NASA
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Particle Physics and Astronomy Research Council (PPARC)
- Yigal-Alon Fellowship
- German-Israeli Foundation for Research and Development
- 2028-1093.7/2001
- Created
-
2018-03-09Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Caltech groups
- TAPIR, Space Radiation Laboratory