|Title||The accretion geometry in a black-hole binary at very low luminosities|
|Author||Dr Felix Fuerst|
|Description||We propose to make a joint 80 ks XMM-Newton plus 40 ks NuSTAR observation of a new or known black hole transient during the end of an outburst, after it entered the low-hard state. The goal is to measure the inner truncation radius of the accretion disk and to study the accretion geometry before the black hole goes into quiescence again. We aim to observe a source at luminosities below 1% L_edd, to measure the most significant changes in the inner radius and taking full advantage of the combined sensitivity of XMM and NuSTAR. The observations will be supported by radio observations to study the connection between the accretion disk and jet power.|
|Publication||GRS 1739-278 Observed at Very Low Luminosity with XMM-Newton and NuSTAR . Furst, F., Tomsick, J. A., et all. . ApJ . 832-115 . 2016 . 2016ApJ...832..115F ,
|Instrument||EPN, RGS1, OM, RGS2, EMOS1, EMOS2|
|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, 2016-10-08T22:00:00Z, 076221, 17.56_20190403_1200. https://doi.org/10.5270/esa-ofbxbaj|