154 citations · 1k across the 27 of their papers we have counts for
26 papers
Hard X-ray Cataclysmic Variables
D. de Martino, F. Bernardini, K. Mukai +2
Among hard X-ray Galactic sources detected in the Swift and INTEGRAL surveys, those discovered as accreting white dwarf binaries have suprisingly boosted in number in the recent ye…
Discovery of a 2.8 s pulsar in a 2 d orbit High-Mass X-ray Binary powering the Ultraluminous X-ray source ULX-7 in M51
G. A. Rodríguez Castillo, G. L. Israel, A. Belfiore +26
We discovered 2.8 s pulsations in the X-ray emission of the ultraluminous X-ray source (ULX) M51 ULX-7 within the UNSEeN project, which was designed to hunt for new pulsating ULXs…
Bright mini-outburst ends the 12-year long activity of the black hole candidate Swift J1753.5-0127
Guobao Zhang, F. Bernardini, D. M. Russell +16
We present optical, UV and X-ray monitoring of the short orbital period black hole X-ray binary candidate Swift J1753.5-0127, focusing on the final stages of its 12year long out…
Optical precursors to X-ray binary outbursts
David M. Russell, D. M. Bramich, F. Lewis +14
Disc instability models predict that for X-ray binaries in quiescence, there should be a brightening of the optical flux prior to an X-ray outburst. Tracking the X-ray variations o…
The true nature of Swift J0746.3-1608: a possible Intermediate Polar showing accretion state changes
F. Bernardini, D. de Martino, K. Mukai +1
Optical and X-ray observations suggested that the 9.38 h binary, SWIFT J0746.3- 1608 could be a Cataclysmic Variable of the magnetic or nova-like type, or a low mass X-ray binary.…
IGR J14257-6117, a magnetic accreting white dwarf with a very strong X-ray orbital modulation
F. Bernardini, D. de Martino, K. Mukai +1
IGR J14257-6117 is an unclassified source in the hard X-ray catalogues. Optical follow-ups suggest it could be a Cataclysmic Variable of the magnetic type. We present the first hig…
HST spectrum and timing of the ultra-compact X-ray binary candidate 47 Tuc X9
V. Tudor, J. C. A. Miller-Jones, C. Knigge +17
To confirm the nature of the donor star in the ultra-compact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3,00010,000 Å) with the Hubble Space Telescope / Spac…
IGR J19552+0044: A new asynchronous short period polar: "Filling the gap between intermediate and ordinary polars"
G. Tovmassian, D. Gonzalez-Buitrago, J. Thorstensen +23
Based on XMM--Newton X-ray observations IGR J19552+0044 appears to be either a pre-polar or an asynchronous polar. We conducted follow-up optical observations to identify the sourc…
Up and Down the Black Hole Radio/X-ray Correlation: the 2017 mini-outbursts from Swift J1753.5-0127
R. M. Plotkin, J. Bright, J. C. A. Miller-Jones +20
The candidate black hole X-ray binary Swift J1753.5-0127 faded to quiescence in 2016 November, after a prolonged outburst that was discovered in 2005. Nearly three months later the…
The accretion environment of Supergiant Fast X-ray Transients probed with XMM-Newton
E. Bozzo, F. Bernardini, C. Ferrigno +3
Supergiant fast X-ray transients (SFXTs) are characterized by a remarkable variability in the X-ray domain, widely ascribed to the accretion from a clumpy stellar wind. In this pap…
Disk-jet coupling in low-luminosity accreting neutron stars
V. Tudor, J. C. A. Miller-Jones, A. Patruno +12
In outburst, neutron star X-ray binaries produce less powerful jets than black holes at a given X-ray luminosity. This has made them more difficult to study as they fade towards qu…
On the Optical -- X-ray correlation from outburst to quiescence in Low Mass X-ray Binaries: the representative cases of V404 Cyg and Cen X-4
F. Bernardini, D. M. Russell, K. I. I. Koljonen +3
Low mass X-ray binaries (LMXBs) show evidence of a global correlation of debated origin between X-ray and optical luminosity. We study for the first time this correlation in two tr…
The variable spin-down rate of the transient magnetar XTE J1810--197
F. Pintore, F. Bernardini, S. Mereghetti +7
We have analyzed XMM-Newton and Chandra observations of the transient magnetar XTE J1810-197, spanning more than 11 years, from the initial phases of the 2003 outburst to the curre…
Events leading up to the June 2015 outburst of V404 Cyg
F. Bernardini, D. M. Russell, A. W. Shaw +5
On 2015 June 15 the burst alert telescope (BAT) on board {\em Swift} detected an X-ray outburst from the black hole transient V404 Cyg. We monitored V404 Cyg for the last 10 years…
Swift J0525.6+2416 and IGR J04571+4527: two new hard X-ray selected magnetic cataclysmic variables identified with XMM-Newton
F. Bernardini, D. de Martino, K. Mukai +4
IGR J04571+4527 and Swift J0525.6+2416 are two hard X-ray sources detected in the Swift/BAT and INTEGRAL/IBIS surveys. They were proposed to be magnetic cataclysmic variables of th…
Unambiguous Detection of Reflection in Magnetic Cataclysmic Variables: Joint NuSTAR-XMM-Newton Observations of Three Intermediate Polars
Koji Mukai, Vikram Rana, Federico Bernardini +1
In magnetic cataclysmic variables (CVs), X-ray emission regions are located close to the white dwarf surface, which is expected to reflect a significant fraction of intrinsic X-ray…
Long-term soft X-ray characterization of Supergiant Fast X-ray Transients: the cumulative luminosity distributions
E. Bozzo, P. Romano, L. Ducci +2
We constructed the cumulative luminosity distributions of most supergiant fast X-ray transients (SFXTs) and the classical supergiant X-ray binary (SgXB) IGR J18027-2016 by taking a…
Investigating Variability of Quiescent Neutron Stars in the Globular Clusters NGC 6440 and Terzan 5
A. R. Walsh, E. M. Cackett, F. Bernardini
The quiescent spectrum of neutron star low-mass X-ray binaries typically consists of two components - a thermal component associated with emission from the neutron star surface, an…
Supergiant fast X-ray transients as an under-luminous class of supergiant X-ray binaries
E. Bozzo, P. Romano, L. Ducci +2
The usage of cumulative luminosity distributions, constructed thanks to the long-term observations available through wide field hard X-ray imagers, has been recently exploited to s…
Multiwavelength search for counterparts of supersoft X-ray sources in M31
E. Chiosi, M. Orio, F. Bernardini +2
We searched optical/UV/IR counterparts of seven supersoft X-ray sources (SSS) in M31 in the Hubble Space Telescope (HST) "Panchromatic Hubble Andromeda Treasury" (PHAT) archival im…
X-ray and UV correlation in the quiescent emission of Cen X-4, evidence of accretion and reprocessing
F. Bernardini, E. M. Cackett, E. F. Brown +5
We conducted the first long-term (60 days), multiwavelength (optical, ultraviolet, and X-ray) simultaneous monitoring of Cen X-4 with daily Swift observations, with the goal of und…
On the nature of the hard X-ray sources SWIFTJ1907.3-2050, IGRJ12123-5802 and IGRJ19552+0044
F. Bernardini, D. de Martino, K. Mukai +7
The INTEGRAL and Swift hard X-ray surveys have identified a large number of new sources, among which many are proposed as Cataclysmic Variables (CVs). Here we present the first det…
Daily, multiwavelength Swift monitoring of the neutron star low-mass X-ray binary Cen X-4: evidence for accretion and reprocessing during quiescence
F. Bernardini, E. M. Cackett, E. F. Brown +5
We conducted the first long-term (60 days), multiwavelength (optical, ultraviolet, and X-ray) simultaneous monitoring of Cen X-4 with daily Swift observations from June to August 2…
Characterization of new hard X-ray Cataclysmic Variables
F. Bernardini, D. de Martino, M. Falanga +5
We aim at characterizing a sample of 9 new hard X-ray selected Cataclysmic Variable (CVs), to unambiguously identify them as magnetic systems of the Intermediate Polar (IP) type. W…