In order to further our understanding of the emitting and absorbing material inhigh-mass X-ray binaries (HMXB) and the accretion states of the sources,wepropose a total of 30 ksec XMM-Newton observation of 4U 1907+09 to be conductedas two 15 ksec observations at different binary phases.In two archival ASCA SISspectra of 4U 1907+09,we found evidence for the presence of 6.9 keV Fe XXVIabsorption features at around 2sigma confidence which will yield 5sigmadetection with EPIC pn CCDs and the modelling will allow the properties of aphoto-ionized absorber to be determined for the first time in a HMXB. Ourproposed observation at the chosen phases will for the first time determinespectra at low count rate levels over a factor of 100 difference from the source.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2009-04-18T10:20:36Z/2009-04-18T18:10:11Z
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, Prof Solen Balman, 2010, 'A Search for Photo-ionized Absorbers in High Mass X-ray Binaries: 4U 1907+09', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-sd433o5
