4U 1700+24 and GX 1+4 are the only two symbiotic binaries out of virgul200 thatcontain neutron-stars. Observationally, the two systems are quite different. Inorder to understand these differences, we propose a 26 ks XMM-Newton observationof 4U 1700+24 to carry out simultaneous X-ray and UV spectroscopy, and also totest the wind-accretion model. Using RGS, we will resolve the emission featurenear 0.6 keV seen by ASCA, measure the constituent line centre energies andwidths, and estimate abundances in the line-emitting material. With the OM, wewill investigate the relationship between the X-ray and nebular UV line emis-sion. Finally, we will compare the results to our approved Chandra observationof GX 1+4 as part of a broader project focussing on wind accretion in LMXBs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-03-07T01:08:08Z/2003-08-13T19:40:38Z
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 Duncan Galloway, 2004, 'Simultaneous X-ray and UV spectroscopy of the symbiotic HD 154791/4U 1700+24', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-29dloyb
