| Name | 055492 |
| Title | Changing Type Seyferts galaxies and the AGN Unified Model |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0554920301 |
| DOI | https://doi.org/10.5270/esa-lgcg3rn |
| Author | Ms Amalia Corral |
| Description | The aim of the present proposal to test whether the apparent mismatch between X-ray absorption and optical spectral type (attributable to reddening) in some AGN is real or due to changes in he source properties, as predicted by the AGN Unified Scheme. We propose here to complete the quasi-simultaneous -- X- ray-Optical-- observation program of a well-defined sample of Changing Type Seyferts we started in AO3 and continued to AO6. Besides the simultaneous observations, we will perform delayed optical spectroscopy to account for possible time lags between changes in the X-ray source and optical. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-08-07T02:28:50Z/2008-08-07T07:22:31Z |
| 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 | 2009-09-02T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2009-09-02T00:00:00Z, 055492, 17.56_20190403_1200. https://doi.org/10.5270/esa-lgcg3rn |