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Yoshiaki Hyodo, Yoshihiro Ueda, Takayuki Yuasa, Yoshitomo Maeda, Kazuo Makishima, Katsuji Koyama, Timing and Spectral Study of AXJ1745.6|$-$|2901 with Suzaku, Publications of the Astronomical Society of Japan, Volume 61, Issue sp1, 30 January 2009, Pages S99–S106, https://doi.org/10.1093/pasj/61.sp1.S99
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The eclipsing low-mass X-ray binary AX J1745.6|$-$|2901 was observed with Suzaku in its outburst phase. Combining the Chandra observation made 1.5 month earlier than Suzaku, we determined the orbital period to be 30063.76|$\pm$|0.14 s. We found deep flux dips prior to the eclipse phase of the orbit. The X-ray spectrum of the persistent phase is described by a combination of a direct and a scattered-in components by dust emission. During the eclipse, the X-ray spectrum becomes only the dust scattering (scattered-in) component. The optical depth of the dust scattering is |$\sim$| 10.5 at 1 keV. The direct component is composed of a blackbody likely from the neutron-star surface and a disk-blackbody. No power-law component is found in the hard energy band up to 30 keV. A clear edge at |$\sim$| 7.1 keV in the deep dip spectrum indicates that the major portion of Fe in the absorber is neutral, or in a low ionization state. We discovered four narrow absorption lines near the K-shell transition energies of Fe XXV, Fe XXVI, and Ni XXVII. The absorption line features are well explained by the solar abundance gas in a bulk motion of |$\sim$| 10|$^{3}$|kms|$^{-1}$|.
