Recent XMM-Newton and Chandra observations show strong indications that X-rayweak quasar.s spectra harbor a relativistically broaden iron line. Three obser-vations of X-ray weak quasars show unique absorbing material with physical con-ditions, which are not comparable with the absorbers described for AGNs so far:The absorbers in X-ray weak quasars have much higher column density and ionizat-ion parameter. This can be understood if our line of sight to the nucleus grazesthe upper tip of the torus. We propose observations of two X-ray weak quasarsfor which relativistic iron lines have been detected to determine the linephysical parameters. We want to measure the disk inclination angle and to checkif it is aligned with the viewing angle suggested by the absorption features.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-11-20T21:12:56Z/2006-01-25T05:27:48Z
Version
17.56_20190403_1200
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.
European Space Agency, Dr Norbert Schartel, 2007, 'The broad iron lines in X-ray weak quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-7os1vku
