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The lamp-post geometry is often used to model X-ray data of accreting blackholes. Despite its simple assumptions, it has proven to be powerful ininferring fundamental black hole properties such as the spin. Early results ofX-ray reverberations showed support for such a simple picture, thoughwind-reverberation models have also been shown to explain the observed delays.Here, we analyze new and old XMM-Newton observations of the variable Seyfert-1galaxy NGC 5506 to test these models. The source shows an emission line featurearound 6.7 keV that is delayed relative to harder and softer energy bands. Thespectral feature can be modeled with either a weakly relativistic disk line orby scattering in distant material. By modeling both the spectral and timingsignatures, we find that the reflection fraction needed to explain the lags islarger than observed in the time-averaged spectrum, ruling out both a staticlamp-post and simple wind reverberation models.

Testing The Lamp-Post and Wind Reverberation Models with XMM-Newton Observations of NGC 5506