| Proposal ID | 006754 |
| Title | O VIII Recombination Features in the X-ray Spectra of Seyfert 2 Galaxies. |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0067540201 |
| DOI | https://doi.org/10.5270/esa-hu1vtqz |
| Principal Investigator, PI | Dr Robert Warwick |
| Abstract | We propose deep XMM EPIC observations of the Seyfert 2 galaxies NGC 4507 and Mrk 348. Our primary objective is to test the hypothesis that the soft excess observed in the X-ray spectra of these heavily obscured AGN is due to electron scattering of the nuclear continuum. Our approach is to use the recombination continua of OVIII and other hydrogenic ions produced in the hot photoionized scattering medium as a diagnostic of the electron temperaturein the X-ray scattering region. The high signal-to-noise EPIC measurementswill also reveal whether Compton reflection makes a significant contribution to the hard X-ray spectra of these normal Seyfert 2s. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-07-18T03:43:05Z/2002-07-18T17:28:03Z |
| Version | 21.51_20241115_1113 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2003-09-06T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "hard xray spectra", "soft excess", "noise epic measurements", "XMM", "hydrogenic ions", "galaxy ngc 4507", "xray spectra", "EPIC", "xray scattering region", "mrk 348", "viii recombination", "electron temperature", "heavily obscured agn", "galaxy ..", "NGC 4507", "electron scattering", "nuclear continuum", "recombination continua", "deep xmm epic", "primary objective", "compton reflection makes" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Robert Warwick, 2003, 'O VIII Recombination Features in the X-ray Spectra of Seyfert 2 Galaxies.', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-hu1vtqz |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |