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We present the results from analyses of Suzaku observations of the supergiantX-ray binaries IGR J16207-5129 and IGR J17391-3021. For IGR J16207-5129, weprovide the first broadband (0.5--60 keV) spectrum from which we confirm alarge intrinsic column density (nH = 16e22 /cm2), and constrain the cutoffenergy for the first time (Ec = 19 keV). We observed a prolonged (> 30 ks)attenuation of the X-ray flux which we tentatively attribute to an eclipse ofthe probable neutron star by its massive companion. For IGR J17391-3021, wewitnessed a transition from quiescence to a low-activity phase punctuated byweak flares whose peak luminosities in the 0.5--10 keV band are only a factorof 5 times that of the pre-flare emission. The weak flaring is accompanied byan increase in the absorbing column which suggests the accretion of obscuringclumps of wind. Placing this observation in the context of the recent Swiftmonitoring campaign, we now recognize that these low-activity epochs constitutethe most common emission phase for this system, and perhaps in other SFXTs aswell.

Suzaku captures a possible eclipse in IGR J16207-5129 and identifies a weak-flaring state in IGR J17391-3021