Investigating Time Lags In Reflection-Dominated AGN

Iron K relativistic reverberation has been observed in several AGN, with delayscomparable to the light crossing time very close to the black hole. In thisframework, objects with no reflection or with reflection only spectra shouldshow no relativistic reverberation. An object with no reflection was the targetof a previous accepted XMM proposal. This proposal explores the case of areflection only source. We request a 120 ks observation of thereflectiondominated MRK 478, a highly variable object whosereflectiondominated state is brighter than other objects in similar state. Thegoal is to directly test the prediction of relativistic reverberation that nodirecttoreflected delay is present. The data will allows us to search for second order delays in the reflected emission itself. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]