ASCA obsevations of the LMXRB X0918-54,X1543-62 and X0614+09 reveal strongemission lines in the 0.5-1 keV band.The emission is consistent with O and Fe L,but major uncertanties remain in establishing the line emission mechanism. Therecombination continuum,a signature of photoionization, is missing or at lowerlevel in all systems. A collisional plasma better reproduces the spectrum.Scattering and 3-body recombinations are other possible mechanism that can lowerthe recombination.We propose to observe X0918-54 and X1543-62 with the XMMgratings.These observations will differentiate line emission with anunprecedented resolving power. This capability will pin down the mechanismresponsible for the line emission, and define abundances to constrain the system
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2001-02-04T13:17:58Z/2001-05-05T14:23:12Z
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 Lorella Angelini, 2002, 'Resolving Low energy lines from LMXRB', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-27apolb
