|Title||Xray Observations of optically selected Seyfert Galaxies|
|Author||Dr Ioannis Georgantopoulos|
|Description||Recent X-ray surveys have shown a dramatic deficit of obscured AGN at high redshift. This comes in contrast with the situation in the nearby Universe which shows a huge fraction of heavily absorbed objects. However, this discrepancy may arise because the column density information locally is ill-determined. Here, we propose to obtain snapshot (10 ksec) observations of an optically selected sample (12) of nearby Seyfert galaxies from the Ho et al.catalogue. Together with the galaxies which have been already observed, our survey will cover ALL the Sy galaxies in the above sample. The superb quality XMM-Newton spectra will accurately probe the column densities and will provide the least biased measurement of the AGN column density distribution locally.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2008-08-29T00:00:00Z, 030165, 17.56_20190403_1200. https://doi.org/10.5270/esa-sjrh1uz|