Abstract

We present here our results on the hour like time scale Xray flux variations in a sample of active galactic nuclei using data from the Nuclear Spectroscopic Telescope Array (NuSTAR). We find that in the 3−79 keV band, BL Lacs aremore variable than flat spectrumradio quasars and Seyfert galaxies. Among Seyferts, Seyfert 2s are more variable than Seyfert 1s. Also, radio-loud quasars are more variable in the hard (10−79 keV) band than the soft (3−10 keV) band while, Seyfert galaxies tend to show more variations in the soft band relative to the hard band.