A Global Study of X-ray Binaries (2008)
Dunn, Robert, Fender, Rob, Koerding, Elmar, Cabanac, Clement, Belloni, Tomaso
We present preliminary results on a global study of X-ray binaries using 14 Ms of data from the Rossi X-ray Timing Explorer satellite. Our initial study on GX 339-4 is recapped as an introduction to...
Multiwavelength observations of the black hole candidate Swift J1753.5-0127 (2008)
Soleri, Paolo, Altamirano, Diego, Fender, Rob, Casella, Piergiorgio, Tudose, Valeriu, Maitra, Dipankar, ...
We present preliminary results from the analysis of simultaneous multiwavelength observations of the black hole candidate Swift J1753.5-0127. The source is still continuing its outburst started in...
A transient low-frequency QPO from the black hole binary GRS 1915+105 (2007)
Soleri, Paolo, Belloni, Tomaso, Casella, Piergiorgio
We present the results of the timing analysis of five Rossi X-ray Timing Explorer observations of the Black Hole Candidate GRS 1915+105 between 1996 September and 1997 December. The aim was to...
Mendez, Mariano, Belloni, Tomaso
There is a general consensus that the frequencies of the kilohertz Quasi-Periodic Oscillations (kHz QPOs) in neutron-star low-mass X-ray binaries are directly linked to the spin of the neutron star....
Eight powers of ten: similarities in black hole accretion on all mass scales (2007)
Fender, Rob, Koerding, Elmar, Belloni, Tomaso, Uttley, Phil, McHardy, Ian, Tzioumis, Tasso
In this paper we discuss the recent advances in the quantitative comparison of accretion, and the accretion:jet coupling, in accreting black holes in both X-ray binaries (where M ~ 10Msun) and Active...
Accretion onto black holes and relativistic jets (2007)
Relativistic jets from Active Galactic Nuclei are known since decades, but the study of the connection between accretion and ejection in these systems is hampered by the long time scales associated...
RossiXTE monitoring of 4U 1636-53: I. Long-term evolution and kHz Quasi-Periodic Oscillations (2007)
Belloni, Tomaso, Homan, Jeroen, Motta, Sara, Ratti, Eva, Mendez, Mariano
We have monitored the atoll-type neutron star low-mass X-ray binary 4U 1636-53 with the Rossi X-Ray Timing Explorer (RXTE) for more than 1.5 years. Our campaign consisted of short (~2 ks) pointings...
Noisy Jets and Emission Components in Galactic X-Ray Binaries (2007)
Our knowledge of the phenomenology of accretion onto black holes has increased considerably thanks to ten years of observations with the RXTE satellite. However, only recently it has been possible to...
Arshakian, Tigran G., Belloni, Tomaso
We study the correlations between the jet ejection event and changes in the continuum emission of the radio-loud galaxy 3C 390.3, using the archived monitoring data in radio, optical and X-ray. We...
An INTEGRAL monitoring of GRS 1915+105 using simultaneous space and ground based instruments (2006)
Rodriguez, Jerome, Pooley, Guy, Hannikainen, Diana, Lehto, Harry J., Belloni, Tomaso, Cadolle-Bel, Marion, ...
We report the results of 3 observations of GRS 1915+105 during which the source is found to show the X-ray dips/spike sequences (cycles). These observations were performed simultaneously with...
Homan, Jeroen, Van Der Klis, Michiel, Wijnands, Rudy, Belloni, Tomaso, Fender, Rob, Klein-Wolt, Marc, ...
(Abridged) We report on ten weeks of RXTE observations of the X-ray transient XTE J1701-462. Comparisons with other sources suggest it had all the characteristics of the neutron star Z sources (the...
The XMM-Newton view of GRS1915+105 during a "plateau" (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collected with EPIC-pn in...
The XMM-Newton view of GRS1915+105 during a "plateau" (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collected with EPIC-pn in...
The XMM-Newton view of GRS1915+105 during a "plateau" (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collected with EPIC-pn in...
The XMM-Newton View of GRS1915+105 (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show just small amplitude...
The XMM-Newton View of GRS1915+105 (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show just small amplitude...
The XMM-Newton view of GRS1915+105 during a "plateau" (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collected with EPIC-pn in...
The XMM-Newton View of GRS1915+105 (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show just small amplitude...
The XMM-Newton view of GRS1915+105 during a "plateau" (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collected with EPIC-pn in...
The XMM-Newton View of GRS1915+105 (2006)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show just small amplitude...
XMM-Newton observations of the black hole X-ray transient XTE J1650-500 in quiescence (2005)
Homan, Jeroen, Wijnands, Rudy, Kong, Albert, Miller, Jon M., Rossi, Sabrina, Belloni, Tomaso, ...
We report the result of an XMM-Newton observation of the black-hole X-ray transient XTE J1650-500 in quiescence. The source was not detected and we set upper limits on the 0.5-10 keV luminosity of...
The XMM-Newton View of GRS1915+105 (2005)
Martocchia, Andrea, Matt, Giorgio, Belloni, Tomaso, Feroci, Marco, Karas, Vladimir, Ponti, Gabriele
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show just small amplitude...
Black-Hole Transients : From QPOs to Relativistic Jets (2005)
Due to the impressive amount of new data provided by the RXTE satellite in the past decade, our knowledge of the phenomenology of accretion onto black holes has increased considerably. In particular,...
A continuous Flaring- to Normal-branch transition in Sco X-1 (2005)
Casella, Piergiorgio, Belloni, Tomaso, Stella, Luigi
We report the first resolved rapid transition from a Flaring Branch Oscillation to a Normal Branch Oscillation in the RXTE data of the Z source Sco X-1. The transition took place on a time scale of...
A unified model for black hole X-ray binary jets ? (2005)
Fender, Rob, Belloni, Tomaso, Gallo, Elena
We have recently put forward a 'unified' semi-empirical model for the coupling between accretion and jet production in galactic black hole X-ray binaries (published in MNRAS, 2004). In this paper we...
Discovery of Rapid X-ray Oscillations in the Tail of the SGR 1806-20 Hyperflare (2005)
Israel, GianLuca, Belloni, Tomaso, Stella, Luigi, Rephaeli, Yoel, Gruber, Duane, Casella, Pier Giorgio, ...
We have discovered rapid Quasi Periodic Oscillations (QPOs) in RXTE/PCA measurements of the pulsating tail of the 27th December 2004 giant flare of SGR 1806-20. QPOs at about 92.5Hz are detected in a...
Rossi, Sabrina, Homan, Jeroen, Miller, Jon M., Belloni, Tomaso
We present the results of spectral fits made to 57 pointed observations of the Galactic black hole candidate and X-ray transient XTE J1650-500, made with the Rossi X-ray Timing Explorer in 2001 when...
Black Hole States: Accretion and Jet Ejection (2005)
The complex spectral and timing properties of the high-energy emission from the accretion flow in black-hole binaries, together with their strong connection to the ejection of powerful relativistic...
Homan, Jeroen, Buxton, Michelle, Markoff, Sera, Bailyn, Charles D., Nespoli, Elisa, Belloni, Tomaso
(Abridged) We report on RXTE and optical/near-infrared (nIR) observations of the black hole transient GX 339-4, made over a time span of 8 months in 2002 and covering the initial rise and transition...
The distribution of kHz QPO frequencies in bright LMXBs (2005)
Belloni, Tomaso, Mendez, Mariano, Homan, Jeroen
We analyzed all published frequencies, nu_1 and nu_2, of the twin kilohertz quasi-periodic oscillations (kHz QPOs) in bright neutron star low-mass X-ray binaries. The two frequencies are well...
The evolution of black hole states (2004)
Homan, Jeroen, Belloni, Tomaso
We discuss the evolution of black hole transients on the basis of a few systems that were intensively observed with the Rossi X-ray Timing Explorer. We focus on the global evolution and the observed...
A Lack of Radio Emission from Neutron Star Low Mass X-ray Binaries (2004)
Muno, Michael P., Belloni, Tomaso, Dhawan, Vivek, Morgan, Edward H., Remillard, Ronald A., Rupen, Michael P.
We report strict upper limits to the radio luminosities of three neutron star low-mass X-ray binaries obtained with the Very Large Array while they were in hard X-ray states as observed with the...
X-ray Observation of SS 433 with RXTE (2004)
Nandi, A., Chakrabarti, Sandip K., Belloni, Tomaso, Goldoni, P.
Apart from regular monitoring by ASM, the compact object SS 433 was observed with RXTE several times last two/three years. We present the first analysis of these observations. We also include the...
The distribution of kHz QPO frequencies in Sco X-1 (2004)
Belloni, Tomaso, Mendez, Mariano, Homan, Jeroen
The frequencies of kHz Quasi-Periodic Oscillations in the bright Low-Mass X-ray Binary Sco X-1 have been reported to appear preferentially in a 3:2 ratio. We show that a proper statistical analysis...
GRS 1915+105 and the disc-jet coupling in accreting black hole systems (2004)
GRS 1915+105—the first stellar-scale, highly relativistic jet source identified—is a key system for our understanding of the disc-jet coupling in accreting black hole systems. Comprehending the...
Casella, Piergiorgio, Belloni, Tomaso, Homan, Jeroen, Stella, Luigi
We present the results of an extensive timing analysis of the 1999 outburst of the soft X-ray transient and black hole candidate XTE J1859+226 as observed with the Rossi X-Ray Timing Explorer. Three...
GRS 1915+105 and the Disc-Jet Coupling in Accreting Black Hole Systems (2004)
GRS 1915+105 - the first stellar-scale, highly relativistic jet source identified - is a key system for our understanding of the disc-jet coupling in accreting black hole systems. Comprehending the...
Homan, Jeroen, Miller, Jon M., Wijnands, Rudy, Van Der Klis, Michiel, Belloni, Tomaso, Steeghs, Danny, ...
We present a variability study of the black hole candidate and X-ray transient H1743-322 during its 2003/2004 outburst. We analyzed five Rossi X-ray Timing Explorer observations that were performed...
X-ray broad band spectral properties of intermediate polars (2004)
Matt, Giorgio., De Martino, Domitilla, Belloni, Tomaso, Chiappetti, Lucio, Haberl, Frank
A Chandra observation of the old open cluster M67 (2003)
Berg, Maureen Van Den, Tagliaferri, Gianpiero, Belloni, Tomaso, Verbunt, Frank
We present the results of a 47-ks Chandra-ACIS observation of the old open cluster M67. We detected 25 proper-motion cluster members (including ten new sources) and 12 sources (all new) that we...
A transient variable 6 Hz QPO from GX 339-4 (2003)
Nespoli, Elisa, Belloni, Tomaso, Homan, Jeroen, Miller, Jon M., Lewin, Walter H. G., Mendez, Mariano, ...
We report the results of an observation with the Rossi X-ray Timing Explorer of the black hole candidate GX 339-4 during its 2002/2003 outburst. This observation took place during a spectral...
State transitions in the 2001/2002 outburst of XTE J1650-500 (2003)
Rossi, Sabrina, Homan, Jeroen, Miller, Jon M., Belloni, Tomaso
We present a study of the X-ray transient and black hole candidate XTE J1650-500 during its 2001/2002 outburst. The source made two state transitions between the hard and soft states, at luminosity...
Chandra Observations of the Faintest Low-Mass X-ray Binaries (2003)
Wilson, Colleen. A., Patel, Sandeep K., Kouveliotou, Chryssa, Jonker, Peter G., Van Der Klis, Michiel, Lewin, Walter H. G, ...
There exists a group of persistently faint galactic X-ray sources that, based on their location in the galaxy, high L_x/L_opt, association with X-ray bursts, and absence of low frequency X-ray...
Evidence for local mass accretion rate variations in the disc of GRS 1915+105 (2003)
Migliari, Simone, Belloni, Tomaso
We have analysed 16 observations of class beta of GRS 1915+105 performed with the Rossi X-ray Timing Explorer. We show the time-resolved evolution (every 16 seconds) of the X-ray spectral parameters...
Chandra Observations of the Anomalous X-ray Pulsar 4U 0142+61 (2002)
Patel, Sandeep K., Kouveliotou, Chryssa, Woods, Peter M., Tennant, Allyn F., Weisskopf, Martin C., Finger, Mark H., ...
We present X-ray imaging, timing, and phase resolved spectroscopy of the anomalous X-ray pulsar 4U 0142+61 using the Chandra X-ray Observatory. The spectrum is well described by a power law plus...
High frequency quasi-periodic oscillations in the black hole X-ray transient XTE J1650-500 (2002)
Homan, Jeroen, Klein-Wolt, Marc, Rossi, Sabrina, Miller, Jon M., Wijnands, Rudy, Belloni, Tomaso, ...
We report the detection of high frequency variability in the black hole X-ray transient XTE J1650-500. A quasi-periodic oscillation (QPO) was found at 250 Hz during a transition from the hard to the...
GRS 1915+105: Ten Years After (2002)
It is now ten years since the first microquasar GRS 1915+105 was discovered. More than six years of observations with RossiXTE have shown a level of variability never observed in any other X-ray...
A Unified Description of the Timing Features of Accreting X-ray Binaries (2002)
Belloni, Tomaso, Psaltis, Dimitrios, Van Der Klis, Michiel
We study an empirical model for a unified description of the power spectra of accreting neutron stars and black holes. This description is based on a superposition of multiple Lorentzians and offers...
Transient Phenomena and Outbursts from Galactic Black-Hole Candidates (2001)
The RossiXTE mission provided us with an unprecedentedly large database of X-ray observations of transient black-hole candidates. These systems are crucial for the understanding of the physical...
A multi-Lorentzian timing study of the atoll sources 4U 0614+09 and 4U 1728-34 (2001)
Van Straaten, Steve, Van Der Klis, Michiel, Di Salvo, Tiziana, Belloni, Tomaso, Psaltis, Dimitrios
We present the results of a multi-Lorentzian fit to the power spectra of two kilohertz QPO sources; 4U 0614+09 and 4U 1728-34. This work was triggered by recent results of a similar fit to the...
Discovery of a kHz QPO in 2S 0918-549 (2001)
Jonker, Peter G., Van Der Klis, Michiel, Homan, Jeroen, Mendez, Mariano, Van Paradijs, Jan, Belloni, Tomaso, ...
We report the discovery of a kilohertz quasi-periodic oscillation (kHz QPO) in the low-mass X-ray binary (LMXB) 2S 0918-549. The kHz QPO has a frequency of 1156+-9 Hz, a FWHM of 70+-20 Hz, and a...
Inner disk oscillations (2000)
The RXTE observations of GRS 1915+105 have given a new impulse to the study of spectral and timing properties of the X-ray emission of black hole candidates. At variance with any other known source,...
Homan, Jeroen, Wijnands, Rudy, Van Der Klis, Michiel, Belloni, Tomaso, Van Paradijs, Jan, Klein-Wolt, Marc, ...
We present an analysis of RXTE data of the X-ray transient XTE J1550-564. The source went through several states, which were divided into spectrally soft and hard states. These states showed up as...
Broad Band X-ray Spectra of M31 Sources with BeppoSAX (1999)
Trinchieri, Ginevra, Israel, Gian Luca, Chiappetti, Lucio, Belloni, Tomaso, Stella, Luigi, Primini, Frank, ...
We present the first spectral study of the X-ray emitting stellar sources in M31 in the energy band from 0.1 to 10 keV. We find that the globular cluster sources have spectral characteristics...
Psaltis, Dimitrios, Belloni, Tomaso, Van Der Klis, Michiel
We study systematically the ~0.1-1200 Hz quasi-periodic oscillations (QPOs) and broad noise components observed in the power spectra of non-pulsing neutron-star and black-hole low-mass X-ray...
Rutledge, Robert E., Lewin, Walter H. G., Van Der Klis, Michiel, Van Paradijs, Jan, Dotani, Tadayasu, Vaughan, Brian, ...
By comparing positions on a spectral color-color diagram from 10 black hole candidates (BHCs) observed with Ginga (1354-64, 1826-24, 1630-47, LMC X-1, LMC X-3, GS 2000+25, GS 2023+33, GS 1124-68, Cyg...
``Canonical'' Black Hole States in the Superluminal Source GRO J1655-40 (1998)
Mendez, Mariano, Belloni, Tomaso, Van Der Klis, Michiel
We analyze RXTE/PCA observations of the black hole candidate and galactic superluminal source GRO J1655-40 during its recent outburst. We show that during its decay to quiescence, GRO J1655-40 goes...
Absorption dips in GRO J1655-40: mapping the inner accretion disk (1997)
Kuulkers, Erik, Wijnands, Rudy, Belloni, Tomaso, Mendez, Mariano, Van Der Klis, Michiel, Van Paradijs, Jan
Using the RXTE PCA we discovered dips in the X-ray light curves of the black-hole candidate GRO J1655-40 during outburst. They are short (~minute) and deep (down to ~8% of the out-of-dip intensity)....
Search for Old Neutron Stars in molecular clouds: Cygnus Rift and Cygnus OB7 (1996)
Belloni, Tomaso, Zampieri, Luca, Campana, Sergio
We present the results of a systematic search for old isolated neutron stars (ONSs) in the direction of two giant molecular clouds in Cygnus (Rift and OB7). From theoretical calculations, we expect...