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  1. No Access

    Article

    The corona contracts in a black-hole transient

    The geometry of the accretion flow around stellar-mass black holes can change on timescales of days to months1–3. When a black hole emerges from quiescence (that is, it ‘turns on’ after accreting material from it...

    E. Kara, J. F. Steiner, A. C. Fabian, E. M. Cackett, P. Uttley, R. A. Remillard… in Nature (2019)

  2. No Access

    Article

    X-ray reverberation around accreting black holes

    Luminous accreting stellar mass and supermassive black holes produce power–law continuum X-ray emission from a compact central corona. Reverberation time lags occur due to light travel time delays between chan...

    P. Uttley, E. M. Cackett, A. C. Fabian, E. Kara… in The Astronomy and Astrophysics Review (2014)

  3. No Access

    Article

    The Large Observatory for X-ray Timing (LOFT)

    High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultradense matter and to black hole masses and spins. A 10 m2-class instrument...

    M. Feroci, L. Stella, M. van der Klis, T. J. -L. Courvoisier… in Experimental Astronomy (2012)

  4. No Access

    Article

    Broad line emission from iron K- and L-shell transitions in the active galaxy 1H 0707-495

    The emission line arising from a transition of an electron from the iron K shell to the ground state (the K line) is prominent in the reflection spectrum of the hard X-ray continuum irradiating dense accreting...

    A. C. Fabian, A. Zoghbi, R. R. Ross, P. Uttley, L. C. Gallo, W. N. Brandt… in Nature (2009)

  5. No Access

    Chapter and Conference Paper

    AGN and XRB Variability: Propagating-Fluctuation Models

    P. Arévalo, P. Uttley in Relativistic Astrophysics Legacy and Cosmology – Einstein’s (2007)

  6. No Access

    Article

    Active galactic nuclei as scaled-up Galactic black holes

    The central engines that drive active galactic nuclei are thought to be supermassive black holes. A long-standing question in astrophysics is whether these central engines vary like Galactic black hole systems...

    I. M. McHardy, E. Koerding, C. Knigge, P. Uttley, R. P. Fender in Nature (2006)