GT-A sample of AGN showing structure in their soft X-rayspectra is to be observed. The physics of the spectralstructure may be 1) a soft excess component above theunderlying power law, possibly from the emission of theaccretion disk, or/and 2) selective absorption due to awarm absorber. The candidate objects have been selected by a systematic study of ROSAT PSPC spectra in comparisonto hard (2-10 keV) spectra measured by HEAO-1, EXOSATor Ginga.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2000-11-29T15:00:12Z/2001-01-13T07:47:16Z
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 Martin Turner, 2002, 'Study of the Soft Excess / Warm Absorber in a Sample of AGN', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-y30orc9
