Browsing by Author "Chand, H."

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The origin of UV-optical variability in AGN and test of disc models: XMM-Newton and ground-based observations of NGC 4395

McHardy, I. M.; Connolly, S. D.; Peterson, B. M.; Bieryla, A.; Chand, H.; Elvis, M. S.; Emmanoulopoulos, D.; Falco, E.; Gandhi, P.; Kaspi, S.; Latham, D.; Lira, P.; McCully, C.; Netzer, H.; Uemura, M. (2016)

The origin of short timescale (weeks/months) variability of AGN, whether due to intrinsic disc variations or reprocessing of X-ray emission by a surrounding accretion disc, has been a puzzle for many years. However recently ...
X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor

McHardy, I. M.; Connolly, S. D.; Horne, K.; Cackett, E. M.; Gelbord, J.; Peterson, B. M.; Pahari, M.; Gehrels, N.; Goad, M.; Lira, P.; Arevalo, P.; Baldi, R. D.; Brandt, N.; Breedt, E.; Chand, H.; Dewangan, G.; Done, C.; Elvis, Martin; Emmanoulopoulos, D.; Fausnaugh, M. M.; Kaspi, S.; Kochanek, C. S.; Korista, K.; Papadakis, I. E.; Rao, A. R.; Uttley, P.; Vestergaard, M.; Ward, Martin J. (2018)

We report the results of intensive X-ray, UV, and optical monitoring of the Seyfert 1 galaxy NGC 4593 with Swift. There is no intrinsic flux-related spectral change in any variable component with small apparent variations ...

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