463 citations · 6.1k across the 68 of their papers we have counts for
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X-ray time delays in the Narrow Line Seyfert 1 galaxy PG 1244+026
William Alston, Chris Done, Simon Vaughan
We analyse the X-ray time-lags in the Narrow Line Seyfert 1 (NLS1) galaxy PG 1244+026 (, ). The time delay between the soft (0…
Black Holes in Short Period X-ray Binaries and the Transition to Radiatively Inefficient Accretion
Gillian Knevitt, Graham Wynn, Simon Vaughan +1
By comparing the orbital period distributions of black hole and neutron star low mass X-ray binaries (LMXBs) in the Ritter-Kolb catalogue we show that there is statistical evidence…
Random time series in Astronomy
Simon Vaughan
Progress in astronomy comes from interpreting the signals encoded in the light received from distant objects: the distribution of light over the sky (images), over photon wavelengt…
The flux-dependent X-ray time lags in NGC 4051
W. N. Alston, S. Vaughan, P. Uttley
We present an analysis of the X-ray time lags for the highly variable Seyfert 1 galaxy NGC 4051, based on a series of XMM-Newton observations taken in 2009. We investigate the Four…
The Hot and Energetic Universe: Astrophysics of feedback in local AGN
M. Cappi, C. Done, E. Behar +30
Understanding the astrophysics of feedback in active galactic nuclei (AGN) is key to understanding the growth and co-evolution of supermassive black holes and galaxies. AGN-driven…
The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
Kirpal Nandra, Didier Barret, Xavier Barcons +237
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of tw…