Abstract
We present preliminary results from a Chandra 30 ks observation of the atoll source 4U 1705-44. In particular we concentrate on the study of the iron K α line, using the HEG spectrometer. The iron K α line at ∼ 6.6 keV is found to be intrinsically broad ( FWHM ∼ 1.7 keV); its width can be explained by reflection from a cold accretion disk extending down to ∼ 17 km from the neutron star center or by Compton broadening in the hotter ( ∼ 3 - 4 keV) corona.
