Publications (48)
The variability of the warm absorber in I Zwicky 1 as seen by XMM-Newton
C. V. Silva, E. Costantini, M. Giustini +4
We present new XMM-Newton observations of the intriguing warm absorber in I Zwicky 1. This luminous and nearby narrow-line Seyfert 1 galaxy shows ionized absorption by two componen…
Alive and kicking: A new QPE phase in GSN 069 revealing a quiescent luminosity threshold for QPEs
G. Miniutti, M. Giustini, R. Arcodia +4
X-ray quasi-periodic eruptions (QPEs) are intense repeating soft X-ray bursts from the nuclei of nearby galaxies. Their physical origin is still largely unconstrained, and several…
Observations of a radio-bright, X-ray obscured GRS 1915+105
S. E. Motta, J. J. E. Kajava, M. Giustini +9
The Galactic black hole transient GRS1915+105 is famous for its markedly variable X-ray and radio behaviour, and for being the archetypal galactic source of relativistic jets. It e…
Outflows and winds in AGNs: a case for Simbol-X
M. Cappi, F. Tombesi, M. Giustini
Chandra and XMM-Newton X-ray observations are accumulating evidence for massive, high velocity outflows in Seyfert galaxies and quasars, most likely originating very close to the c…
The Super-Massive Black Hole close environment in Active Galactic Nuclei
W. Alston, M. Giustini, P. O. Petrucci
Active Galactic Nuclei are powered by accretion of matter onto a supermassive black hole (SMBH) of mass Mbh ~ 10^{5}-10^{9} Msun. The accretion process is indeed the most efficient…
Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus
G. Miniutti, R. D. Saxton, M. Giustini +11
In the past two decades, high amplitude electromagnetic outbursts have been detected from dormant galaxies and often attributed to the tidal disruption of a star by the central bla…