| Proposal ID | 050005 |
| Title | The nature of naked Active Galactic Nuclei |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0500050101 |
| DOI | https://doi.org/10.5270/esa-6ikfj3e |
| Principal Investigator, PI | Dr Mario Gliozzi |
| Abstract | We propose to observe with XMM-Newton 3 sources belonging to a new AGN class:the naked AGN. Preliminary snapshot observations with Chandra demonstrate thatthese objects are easily detectable and no nearby sources are present within aradius of 1 arcminute. Based on optical studies, these AGN appear as type2 fromthe spectral point of view, and as type1 AGN for their variability. The X-raydata, which are unambiguously associated with genuine nuclear activity, arecrucial to shed light on the nature of these enigmatic sources, which may berepresentative of a large class of AGN. XMM-Newton unique capabilities arecrucial to: 1) Investigate the continuum spectrum and the Fe K line; 2) Studythe flux and spectral variability; 3)Compare the SED with those of type1 and type2 AGN. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2007-11-18T21:34:07Z/2007-11-19T10:26:53Z |
| 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 | 2009-01-12T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "shed light", "XMM-Newton", "genuine nuclear activity", "naked agn", "type2 agn", "agn class", "enigmatic sources", "preliminary snapshot", "nearby sources", "continuum spectrum", "XMM", "spectral variability", "type1 agn", "xray data", "easily detectable", "sources belonging", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Mario Gliozzi, 2009, 'The nature of naked Active Galactic Nuclei', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-6ikfj3e |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |