|Title||The physical nature of the sharp spectral featue at 7 keV detected in 1H0707-495|
|Author||Dr Thomas Boller|
|Description||Using XMM-Newton we have observed 1H 0707--495 and find a drop in flux by a factor of more than 2 at a rest-frame energy of virgul7keV without any detectable narrow Fe K-alpha line emission. The energy of this feature suggests a connec- tion with the neutral iron K photoelectric edge, but the lack of any obvious absorption in the spectrum at lower energies makes the interpretation challeng- ing. We explore two alternative explanations for this unusual spectral feature: 1. partial covering absorption by clouds of neutral material and 2. ionised disc reflection with lines and edges blurred together by relativistic effects. The limited statistics mean that the identification of the feature remains ambiguous and requires the obseravation length to be increased by a factor of 4.|
|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, 2003-11-16T00:00:00Z, 014801, 17.56_20190403_1200. https://doi.org/10.5270/esa-s983suy|