We present results of optical long-term variability campaigns (10 – 20 years) of the two Seyfert galaxies NGC 7603 and Mrk 110. The variations of the continuum, of the individual broad line intensities and of their line profiles are investigated in detail and compared to line profile variations in NGC 5548 and NGC 4593. Individual emission line profiles vary differently from line to line and fr...

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We study accretion disk-corona connection in Seyfert 1 galaxies using simultaneous UV/X-ray observations of NGC 4593 (July 14-18, 2016) and 7469 (October 15-19, 2017) performed with AstroSat. use the X-ray (0.5-7.0 keV) data acquired Soft Telescope (SXT) UV (FUV: 130-180 nm, NUV: 200-300 nm) obtained Ultra-Violet Imaging (UVIT). also contemporaneous Swift demonstrate AstroSat's capability for X...

We present results of a variability campaign of Balmer line profiles inNGC 4593. The continuumand the broad emission line intensities varied up to 50 per cent during the observing period. The rms profiles of the Balmer lines as well as the difference line profiles can be described by a limited number of strong components only: a central component and two to four outer components which are locat...