Abstract:The analysis of the broad iron line profile in the X-ray spectra of active galactic nuclei and black hole X-ray binaries allows us to constrain the spin parameter of the black hole. We compare the constraints on the spin value for two X-ray sources, MCG-6-30-15 and GX 339-4, with a broad iron line using present relativistic line models in XSPEC -LAOR and KYRLINE. The LAOR model has the spin value set to the extremal value a = 0.9982, while the KYRLINE model enables direct fitting of the spin parameter. The spi… Show more
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