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We present the first results obtained by the application of theKYNREFREV-reverberation model, which is ready for its use in XSPEC. This modelcomputes the time dependent reflection spectra of the disc as a response to aflash of primary power-law radiation from a point source corona located on theaxis of the black hole accretion disc (lamp-post geometry). Full relativisticeffects are taken into account. The ionisation of the disc is set for eachradius according to the amount of the incident primary flux and the density ofthe accretion disc. We tested the model by fitting model predictions to theobserved time-lag spectra of three Narrow-Line Seyfert 1 galaxies (ARK 564,MCG-6-30-15 and 1H 0707-495), assuming either a rapidly or zero spinning blackhole (BH). The time-lags strongly suggest a compact X-ray source, located closeto the BH, at a height of approx. 4 gravitational radii. This result does notdepend either on the BH spin or the disc ionization. There is no significantstatistical difference between the quality of the best-fits in the rapidly andzero spinning BH scenarios in Ark 564 and MCG-6-30-15. But there is anindication that the hypothesis of a non-rotating BH in 1H 0707-495 is notconsistent with its time-lag spectrum. Finally, the best-fits to the Ark 564and 1H 0707-495 data are of rather low quality. We detect wavy-residuals aroundthe best-fit reverberation model time-lags at high frequencies. This resultsuggests that the simple lamp-post geometry does not fully explain the X-raysource/disc configuration in Active Galactic Nuclei.

Testing the X-ray reverberation model KYNREFREV in a sample of Seyfert 1 Active Galactic Nuclei