A Search for Photo-ionized Absorbers in High Mass X-ray Binaries: 4U 1907+09

Details A Search for Photo-ionized Absorbers in High Mass X-ray Binaries: 4U 1907+09 A Search for Photo-ionized Absorbers in High Mass X-ray Binaries: 4U 1907+09

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..164b&link_type=abstract

XMM-Newton Proposal ID #05554101

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, 4U 1907+09, Xmm-Newton Proposal Id #05554101

Scientific paper

In order to further our understanding of the emitting and absorbing material in high-mass X-ray binaries (HMXB) and the accretion states of the sources,we propose a total of 30 ksec XMM-Newton observation of 4U 1907+09 to be conducted as two 15 ksec observations at different binary phases.In two archival ASCA SIS spectra of 4U 1907+09,we found evidence for the presence of 6.9 keV Fe XXVI absorption features at around 2sigma confidence which will yield 5sigma detection with EPIC pn CCDs and the modelling will allow the properties of a photo-ionized absorber to be determined for the first time in a HMXB. Our proposed observation at the chosen phases will for the first time determine spectra at low count rate levels over a factor of 100 difference from the source.

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