| Name | 030560 |
| Title | Changing type Seyferts and the AGN unified model |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0305600501 |
| DOI | https://doi.org/10.5270/esa-b2nvckj |
| Author | European Space Agency |
| Description | In AO-3 we started a quasi-simultaneous X-ray/optical spectroscopy observation programme of changing type Seyfert galaxies, with the aim of investigating the origin of the apparent X-ray/optical type mismatches seen in some AGN. We use these type-changing AGN to test whether this mismatch is caused by non-simultaneity between the X-ray and optical observations or it is due to intrinsic properties of the Broad Line Region, as suggested by our previous work. In this proposal we request XMM-Newton observations of a sample of 5 targets (in addition to that already performed in AO-3). Quasi-simultaneous and delayed optical spectroscopy of these targets will also be obtained from the ground. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2005-10-27T00:31:37Z/2006-06-14T21:09:56Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 | 2007-07-01T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2007, Changing Type Seyferts And The Agn Unified Model, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-b2nvckj |