Observation of the quiescent X-ray emission of Swift J1749.4 2807

Swift J1749.42807 is the first (and only) eclipsing accreting Xray millisecondpulsar. At variance with all the other transient low mass Xray binaries, SwiftJ1749 is the only source showing eclipses and a hard component in its Xrayquiescent spectrum. This opens the unique opportunity to discriminate betweenmodels that have been proposed for the quiescent emission of neutron startransients. Based on a detailed feasibility we need to follow Swift J1749 forthree orbital periods, totalling 100 ks, to probe the quiescent spectrum with aneclipse mapping technique. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]