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SAX J1748.2$-$2808 is a unique X-ray object with a flat spectrum and strongemission lines at 6.4--7.0 keV. The Suzaku satellite resolved the emissionlines into 3 K-shell lines from neutral and highly ionized irons. A clearcoherent pulsation with a period of 593-sec was found from the Suzaku andXMM-Newton archives. These facts favor that SAX J1748.2$-$2808 isanintermediate polar, a subclass of magnetized white dwarf binary (cataclysmicvariable: CV). This paper reports on details of the findings and discusses theorigin of this source.

Discoveries of 3 K-shell Lines of Iron and a Coherent Pulsation of 593-sec from SAX J1748.2-2808