131 citations · 275 across the 5 of their papers we have counts for
5 papers
X-ray/UV/optical variability of NGC 4593 with Swift: Reprocessing of X-rays by an extended reprocessor
I M McHardy, S D Connolly, K Horne E M Cackett +25
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 the the varia…
Black Hole Mass of the Ultraluminous X-ray source M82 X-1
Gulab C. Dewangan, Lev Titarchuk, Richard E. Griffiths
We report the first clear evidence for the simultaneous presence of a low frequency break and a QPO in the fluctuation power spectrum of a well known ultraluminous X-ray source (UL…
XMM observations of the narrow-line QSO PHL 1092: Detection of a high and variable soft component
Surajit Dasgupta, A. R. Rao, G. C. Dewangan
We present results based on an XMM-Newton observation of the high luminosity narrow-line QSO PHL 1092 performed in 2003 January. The 0.3 - 10 keV spectrum is well described by a mo…
Iron Kalpha emission from the low-luminosity Active Galaxies M81 and NGC 4579
G. C. Dewangan, R. E. Griffiths, T. Di Matteo +1
We report on XMM-Newton spectroscopy of the low-luminosity active galaxies (LLAGN) M81 and NGC4579 both of which have known black hole masses and well-sampled spectral energy distr…
XMM-Newton view of the prototype narrow-line Seyfert 1 galaxy I Zw 1
G. C. Dewangan, R. E. Griffiths
We present results based on an XMM-Newton observation of the prototype narrow-line Seyfert 1 galaxy I Zw 1 performed in June 2002. The 0.6-12 keV spectrum is well described by a st…