Observed 0.5–2 keV (top) and 2–10 keV (bottom) fluxes of F05189–2524 from 1995 to 2006 as determined from ASCA, BeppoSAX, XMM-Newton, Chandra, and Suzaku data. While there has been little change in the 0.5–2 keV flux, the nominal 2–10 keV flux of F05189–2524 has decreased by a factor of ~ 30 since previous observations. The dashed line represents the average "high" state flux (measurements made prior to Suzaku) as weighted by the measurement errors while the dotted lines denote one standard deviation away from the mean. The 2–10 keV flux value as measured by Suzaku is ~ 4 standard deviations away from the weighted mean. The ASCA (1995) and BeppoSAX (1999) values are drawn from Severgnini et al. (2001); the XMM-Newton (2001) and Chandra (2002) values are drawn from our modeling of the archived spectra with the scattering model in this work (see Section 5.1). The error bars for the 2006 value are within the data point.