|Title||Simultaneous X-ray and UV spectroscopy of the symbiotic HD 154791-4U 1700+24|
|Author||Dr Duncan Galloway|
|Description||4U 1700+24 and GX 1+4 are the only two symbiotic binaries out of virgul200 that contain neutron-stars. Observationally, the two systems are quite different. In order to understand these differences, we propose a 26 ks XMM-Newton observation of 4U 1700+24 to carry out simultaneous X-ray and UV spectroscopy, and also to test the wind-accretion model. Using RGS, we will resolve the emission feature near 0.6 keV seen by ASCA, measure the constituent line centre energies and widths, and estimate abundances in the line-emitting material. With the OM, we will investigate the relationship between the X-ray and nebular UV line emis- sion. Finally, we will compare the results to our approved Chandra observation of GX 1+4 as part of a broader project focussing on wind accretion in LMXBs.|
|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, 2004-09-13T00:00:00Z, 015124, 17.56_20190403_1200. https://doi.org/10.5270/esa-29dloyb|