|Title||Black hole transient during transition from hard to soft state|
|Author||Dr Holger Stiele|
|Description||We propose a ToO observation of a transient black-hole candidate, either known or unknown, during its transition from hard to soft state. This transition, which takes place at high flux levels, encompasses marked changes in the properties of the accretion flow and it includes the time at which the ejection of an accelerating relativistic jet stops abruptly. The study of the soft spectral component as well as the behaviour of the iron line is important for our understanding of the accretion disc during state transition. We would like to investigate in particular the process responsible for the disappearance of the variability in the soft energy band, which has been detected in the hard state with XMM-Newton, but is absent in the soft state.|
|Publication||No observations found associated with the current proposal|
|Instrument||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, 2015-10-22T22:00:00Z, 074098, 17.56_20190403_1200. https://doi.org/10.5270/esa-y4igl8o|