Publications (86)
Peering at the outflow mechanisms in the transitional pulsar PSR J1023+0038: simultaneous VLT, XMM-Newton, and Swift high-time resolution observations
M. C. Baglio, F. Vincentelli, S. Campana +6
We report on a NIR, optical and X-ray campaign performed in 2017 with the XMM-Newton and Swift satellites and the VLT/HAWK-I instrument on the transitional MSP PSR J1023+0038. NIR…
A variable Quasi-Periodic Ocillation in M82 X-1. Timing and spectral analysis of XMM-Newton and RossiXTE observations
P. Mucciarelli, P. Casella, T. Belloni +2
We report results from a spectral and timing analysis of M82 X-1, one of the brightest known ultraluminous X-ray sources. Data from a new 105 ks {\it XMM-Newton} observation of M82…
Sub-second infrared variability from the archetypal accreting neutron star 4U~1728-34
F. M. Vincentelli, P. Casella, A. Borghese +23
We report on the first simultaneous high-time resolution X-ray and infrared (IR) observations of a neutron star low mass X-ray binary in its hard state. We performed h…
Jet spectral breaks in black hole X-ray binaries
D. M. Russell, S. Markoff, P. Casella +10
In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to gamma-ray energies, the contribution of the jet is debated. Th…
The kilohertz quasi-periodic oscillations during the Z and atoll phases of the unique transient XTE J1701--462
A. Sanna, M. Mendez, D. Altamirano +6
We analysed 866 observations of the neutron-star low-mass X-ray binary XTE J1701-462 during its 2006-2007 outburst. XTE J1701-462 is the only example so far of a source that during…
An ultraviolet burst oscillation candidate from the low-mass X-ray binary EXO 0748-676
A. Miraval Zanon, F. Ambrosino, G. Illiano +15
X-ray burst oscillations are quasi-coherent periodic signals at frequencies close to the neutron star spin frequency. They are observed during thermonuclear Type I X-ray bursts fro…
LOFT: the Large Observatory For X-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +245
The LOFT mission concept is one of four candidates selected by ESA for the M3 launch opportunity as Medium Size missions of the Cosmic Vision programme. The launch window is curren…
The return of the bursts: Thermonuclear flashes from Circinus X-1
M. Linares, A. Watts, D. Altamirano +14
We report the detection of 15 X-ray bursts with RXTE and Swift observations of the peculiar X-ray binary Circinus X-1 during its May 2010 X-ray re-brightening. These are the first…
Investigating the origin of optical and X-ray pulsations of the transitional millisecond pulsar PSR J1023+0038
G. Illiano, A. Papitto, F. Ambrosino +21
PSR J1023+0038 is the first millisecond pulsar that was ever observed as an optical and UV pulsar. So far, it is the only optical transitional millisecond pulsar. The rotation- and…
An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
G. L. Israel, A. Belfiore, L. Stella +20
Ultraluminous x-ray sources (ULXs) in nearby galaxies shine brighter than any X-ray source in our Galaxy. ULXs are usually modeled as stellar-mass black holes (BHs) accreting at ve…
Optical and ultraviolet pulsed emission from an accreting millisecond pulsar
F. Ambrosino, A. Miraval Zanon, A. Papitto +28
Millisecond spinning, low magnetic field neutron stars are believed to attain their fast rotation in a 0.1-1 Gyr-long phase during which they accrete matter endowed with angular mo…
Geometrical constraints on the origin of timing signals from black holes
S. E. Motta, P. Casella, M. Henze +4
We present a systematic study of the orbital inclination effects on black-hole transients fast time-variability properties. We have considered all the black-hole binaries that have…
Infrared Synchrotron Emission in the Soft State of GX 339-4 and the Mid-Infrared/X-ray Luminosity Plane of Black Hole X-ray Binaries
P. Gandhi, D. M. Russell, M. C. Baglio +33
Progress in understanding the growth of accreting black holes remains hampered by a lack of sensitive coordinated multiwavelength observations. In particular, the mid-infrared (MIR…
The physics of accretion-ejection with LOFT
P. Casella, R. Fender, M. Coriat +29
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…
Intermittent accreting millisecond pulsars: light houses with broken lamps?
D. Altamirano, P. Casella
Intermittent accreting millisecond X-ray pulsars are an exciting new type of sources. Their pulsations appear and disappear either on timescales of hundreds of seconds or on timesc…
The complex behaviour of the microquasar GRS 1915+105 in the rho class observed with BeppoSAX. II: Time-resolved spectral analysis
T. Mineo, E. Massaro, A. D'Ai +6
BeppoSAX observed GRS 1915+105 on October 2000 with a long pointing lasting about ten days. During this observation, the source was mainly in the rho class characterized by bursts…
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. RodrÃguez 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…
Simultaneous and panchromatic observations of the Fast Radio Burst FRB 20180916B
M. Trudu, M. Pilia, L. Nicastro +47
Aims. Fast Radio Bursts are bright radio transients whose origin has not yet explained. The search for a multi-wavelength counterpart of those events can put a tight constrain on t…
The Large Observatory For x-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +341
The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final down-selection for a launch slot in 2022-2024. Thanks…
Intermittent millisecond X-ray pulsations from the neutron-star X-ray transient SAX J1748.9-2021 in the globular cluster NGC 6440
D. Altamirano, P. Casella, A. Patruno +2
We report on intermittent X-ray pulsations with a frequency of 442.36 Hz from the neutron-star X-ray binary SAX J1748.9--2021 in the globular cluster NGC 6440. The pulsations were…
Paving the way to simultaneous multi-wavelength astronomy
M. J. Middleton, P. Casella, P. Gandhi +49
Whilst astronomy as a science is historically founded on observations at optical wavelengths, studying the Universe in other bands has yielded remarkable discoveries, from pulsars…
The nova-like nebular optical spectrum of V404 Cygni at the beginning of the 2015 outburst decay
F. Rahoui, J. A. Tomsick, P. Gandhi +7
We report on FORS2 optical spectroscopy of the black hole X-ray binary V404 Cygni, performed at the very beginning of its 2015 outburst decay, complemented by quasi-simultaneous $S…
Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105
Y. Ueda, K. Yamaoka, C. Sanchez-Fernandez +17
We present the results from a multiwavelength campaign of GRS 1915+105 performed from 2000 April 16 to 25. This is one of the largest coordinated set of observations ever performed…
The lowest frequency Fast Radio Bursts: Sardinia Radio Telescope detection of the periodic FRB 180916 at 328 MHz
M. Pilia, M. Burgay, A. Possenti +35
We report on the lowest-frequency detection to date of three bursts from the fast radio burst FRB 180916, observed at 328 MHz with the Sardinia Radio Telescope (SRT). The SRT obser…
A complex state transition from the black hole candidate Swift J1753.5-0127
P. Soleri, T. Muñoz-Darias, S. Motta +8
We present our monitoring campaign of the outburst of the black-hole candidate Swift J1753.5-0127, observed with the Rossi X-ray Timing Explorer and the Swift satellites. After ~4.…
Measuring fundamental jet properties with multi-wavelength fast timing of the black hole X-ray binary MAXI J1820+070
A. J. Tetarenko, P. Casella, J. C. A. Miller-Jones +9
We present multi-wavelength fast timing observations of the black hole X-ray binary MAXI J1820+070 (ASASSN-18ey), taken with the Karl G. Jansky Very Large Array (VLA), Atacama Larg…
Furiously Fast and Red: Sub-second Optical Flaring in V404 Cyg during the 2015 Outburst Peak
P. Gandhi, S. P. Littlefair, L. K. Hardy +25
We present observations of rapid (sub-second) optical flux variability in V404 Cyg during its 2015 June outburst. Simultaneous three-band observations with the ULTRACAM fast imager…
The strength of Type-C quasi-periodic oscillations in black hole X-ray binaries correlates with the jet inclination
F. M. Vincentelli, N. Bollemeijer, A. Veledina +10
X-ray quasi-periodic oscillations (QPOs) are a characteristic feature of low-mass X-ray binaries (LMXBs). These oscillations have been studied for decades and revealed a rich and c…
Weighing the black holes in ultraluminous X-ray sources through timing
P. Casella, G. Ponti, A. Patruno +3
We describe a new method to estimate the mass of black holes in Ultraluminous X-ray Sources (ULXs). The method is based on the recently discovered ``variability plane'', populated…
Discovery of coherent millisecond X-ray pulsations in Aql X-1
P. Casella, D. Altamirano, A. Patruno +2
We report the discovery of an episode of coherent millisecond X-ray pulsation in the neutron star low-mass X-ray binary Aql X-1. The episode lasts for slightly more than 150 second…
On the nature of the soft gamma-ray emission in the hard state of the black hole transient GRS 1716-249
T. Bassi, J. Malzac, M. Del Santo +9
The black hole transient GRS 1716-249 was monitored from the radio to the gamma-ray band during its 2016-2017 outburst. This paper focuses on the Spectral Energy Distribution (SED)…
A connection between plasma conditions near black hole event horizons and outflow properties
K. I. I. Koljonen, D. M. Russell, J. A. Fernández Ontiveros +9
Accreting black holes are responsible for producing the fastest, most powerful outflows of matter in the Universe. The formation process of powerful jets close to black holes is po…
Black hole candidate XTE J1752-223: Swift observations of canonical states during outburst
P. A. Curran, T. J. Maccarone, P. Casella +5
We present Swift broadband observations of the recently discovered black hole candidate, X-ray transient, XTE J1752-223, obtained over the period of outburst from October 2009 to J…
An evolving compact jet in the black hole X-ray binary MAXI J1836-194
D. M. Russell, T. D. Russell, J. C. A. Miller-Jones +27
We report striking changes in the broadband spectrum of the compact jet of the black hole transient MAXI J1836-194 over state transitions during its discovery outburst in 2011. A f…
The Ultraluminous X-ray sources population of the galaxy NGC 7456
F. Pintore, M. Marelli, R. Salvaterra +28
Ultraluminous X-ray sources (ULXs) are a class of accreting compact objects with X-ray luminosities above 1e39 erg/s. The ULX population counts several hundreds objects but only a…
Super-Eddington Accretion through a Multiwavelength Lens: Searching for Counterparts of Ultraluminous X-ray Sources
R. Amato, M. Bachetti, R. Soria +8
Ultraluminous X-ray sources (ULXs) represent the closest and most accessible laboratories to study sustained super-Eddington accretion onto compact objects. Over the past decade, t…
Discovery of two simultaneous non-harmonically related Quasi-Periodic Oscillations in the 2005 outburst of the black-hole binary GRO J1655-40
S. Motta, J. Homan, T. Muñoz-Darias +4
We studied the low-frequency quasi-periodic oscillations (LFQPOs) in the black hole GRO J1655-40 during the 2005 outburst, using data from the Rossi X-ray Timing Explorer. All LFQP…
Sub-second optical/near-infrared quasi-periodic oscillations from the black hole X-ray transient Swift J1727.8-1613
F. M. Vincentelli, T. Shahbaz, P. Casella +14
We report on the detection of optical/near-infrared (O-IR) quasi-periodic oscillations (QPOs) from the black hole X-ray transient Swift J1727.8-1613. We obtained three X-ray and O-…
The Far Ultraviolet Spectroscopic picture of the Missing Baryons in the Local Group
F. Nicastro, A. Zezas, M. Elvis +6
The number of detected baryons in the low-redshift Universe (z < 1) is far small er than the corresponding number of baryons observed at higher redshift. According to hydrodynamica…
Matter ejections behind the highs and lows of the transitional millisecond pulsar PSR J1023+0038
M. C. Baglio, F. Coti Zelati, S. Campana +23
Transitional millisecond pulsars are an emerging class of sources that link low-mass X-ray binaries to millisecond radio pulsars in binary systems. These pulsars alternate between…
Low frequency oscillations in black holes: a spectral-timing approach to the case of GX 339-4
S. Motta, T. Muñoz-Darias, P. Casella +2
We analyzed RXTE/PCA and HEXTE data of the transient black hole binary GX 339-4, col- lected over a time span of eight years. We studied the properties and the behavior of low freq…
Spectral and timing evolution of the bright failed outburst of the transient black hole Swift J174510.8-262411
M. Del Santo, T. M. Belloni, J. A. Tomsick +13
We studied time variability and spectral evolution of the Galactic black hole transient Swift J174510.8-262411 during the first phase of its outburst. INTEGRAL and Swift observatio…
Physical constraints from near-infrared fast photometry of the black-hole transient GX 339-4
F. M. Vincentelli, P. Casella, P. Petrucci +9
We present results from the first multi-epoch X-ray/IR fast-photometry campaign on the black-hole transient GX 339--4, during its 2015 outburst decay. We studied the evolution of t…
High-frequency Quasi-Periodic Oscillations from GRS 1915+105 in its C state
T. Belloni, P. Soleri, P. Casella +2
We report the results of a systematic timing analysis of RXTE observations of GRS 1915+105 when the source was in its variability class theta, characterized by alternating soft and…
The ABC of low-frequency quasi-periodic oscillations in Black-Hole Candidates: analogies with Z-sources
P. Casella, T. Belloni, L. Stella
Three main types of low-frequency quasi-periodic oscillations (LFQPOs) have been observed in Black Hole Candidates. We re-analyzed RXTE data of the bright systems XTE J1859+226, XT…
Accretion and Ejection Physics at High Time Resolution
F. M. Vincentelli, P. Casella, A. Veledina +18
Accretion onto compact objects is one of the most fundamental phenomena in the astrophysics, powering some of the most luminous objects in the sky. Along with this, accretion has a…
A transient high-coherence oscillation in 4U 1820-30
T. Belloni, I. Parolin, P. Casella
We re-analyzed two Rossi X-Ray Timing Explorer archival observations of the atoll source 4U 1820-30 in order to investigate the detailed time-frequency properties of the source dur…
Wobbling around the clock: magnetically-driven quasi-periodic oscillations in pulsating ultraluminous X-ray sources
M. Veresvarska, M. Imbrogno, R. Amato +8
Ultraluminous X-ray sources (ULXs) are X-ray binary systems containing an accreting neutron star (NS) or black hole emitting at luminosities above the Eddington limit of a $10M_{\o…
Radio-loudness in black hole transients: evidence for an inclination effect
S. E. Motta, P. Casella, R. Fender
Accreting stellar-mass black holes appear to populate two branches in a radio:X-ray luminosity plane. We have investigated the X-ray variability properties of a large number of bla…
Broad-band X-ray spectral evolution of GX 339-4 during a state transition
M. Del Santo, T. M. Belloni, J. Homan +8
We report on X-ray and soft gamma-ray observations of the black-hole candidate GX 339-4 during its 2007 outburst, performed with the RXTE and INTEGRAL satellites. The hardness-inte…
ESO-Athena Synergy White Paper
P. Padovani, F. Combes, M. Diaz Trigo +29
The Advanced Telescope for High ENergy Astrophysics (Athena) is the X-ray observatory mission selected by ESA within its Cosmic Vision 2015-2025 programme to address the Hot and En…
Characterization of the Infrared/X-ray sub-second variability for the black-hole transient GX 339-4
F. M. Vincentelli, P. Casella, T. J. Maccarone +7
We present a detailed analysis of the X-ray/IR fast variability of the Black-Hole Transient GX 339-4 during its low/hard state in August 2008. Thanks to simultaneous high time-reso…
Investigating the disc-jet coupling in accreting compact objects using the black hole candidate Swift J1753.5-0127
P. Soleri, R. P. Fender, V. Tudose +12
In studies of accreting black holes in binary systems, empirical relations have been proposed to quantify the coupling between accretion processes and ejection mechanisms. These pr…
Discovery of a magnetar candidate X-ray pulsar in the Large Magellanic Cloud
M. Imbrogno, G. L. Israel, G. A. RodrÃguez Castillo +11
During a systematic search for new X-ray pulsators in the XMM-Newton archive, we discovered a high amplitude () periodic () modulation in the…
eXTP -- enhanced X-ray Timing and Polarimetry Mission
S. N. Zhang, M. Feroci, A. Santangelo +181
eXTP is a science mission designed to study the state of matter under extreme conditions of density, gravity and magnetism. Primary targets include isolated and binary neutron star…
Fast infrared variability from the black-hole candidate MAXI J1535571 and tight constraints on the modelling
F. M. Vincentelli, P. Casella, D. Russell +7
We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black-hole transient MAXI J1535571. The data studied in this work consist of two…
Covariance spectrum of MAXI J1820+070: On the nature of the Comptonizing flow
Shuai-Kang Yang, Bei You, Niek Bollemeijer +8
We present an analysis of the covariance spectrum of the black hole X-ray binary MAXI J1820+070 during its hard state. For the first time, we extend coherence and covariance studie…
A variable mid-infrared synchrotron break associated with the compact jet in GX 339-4
P. Gandhi, A. W. Blain, D. M. Russell +11
Many X-ray binaries remain undetected in the mid-infrared, a regime where emission from their compact jets is likely to dominate. Here, we report the detection of the black hole bi…
The appearance of a compact jet in the soft-intermediate state of 4U 1543-47
D. M. Russell, P. Casella, E. Kalemci +4
Recent advancements in the understanding of jet-disc coupling in black hole candidate X-ray binaries (BHXBs) have provided close links between radio jet emission and X-ray spectral…
Fast infrared variability from a relativistic jet in GX 339-4
P. Casella, T. J. Maccarone, K. O'Brien +14
We present the discovery of fast infrared/X-ray correlated variability in the black-hole transient GX 339-4. The source was observed with sub-second time resolution simultaneously…
X-ray and optical polarization aligned with the radio jet ejecta in GX 339-4
G. Mastroserio, B. De Marco, M. C. Baglio +27
We present the first X-ray polarization measurements of GX 339-4. IXPE observed this source twice during its 2023-2024 outburst, once in the soft-intermediate state and again durin…
Rapid optical and X-ray timing observations of GX 339-4: multi-component optical variability in the low/hard state
P. Gandhi, V. S. Dhillon, M. Durant +9
A rapid timing analysis of VLT/ULTRACAM and RXTE observations of the black hole binary GX 339-4 in its 2007 low/hard state is presented. The optical light curves in the r', g' and…
Wide-band X-ray variability of GRS 1915+105 observed with BeppoSAX
P. Casella, M. Feroci, E. Massaro +9
The Galactic Microquasar GRS 1915+105 was observed by the Narrow Field Instruments onboard BeppoSAX in two pointings during year 2000. We present the preliminary results of wide-ba…
Discovery of an accreting millisecond pulsar in the eclipsing binary system Swift J1749.4-2807
D. Altamirano, Y. Cavecchi, A. Patruno +12
We report on the discovery and the timing analysis of the first eclipsing accretion-powered millisecond X-ray pulsar (AMXP): SWIFT J1749.4-2807. The neutron star rotates at a frequ…
A parsec scale X-ray extended structure from the X-ray binary Circinus X-1
P. Soleri, S. Heinz, R. Fender +8
We present the results of the analysis of two Chandra observations of Circinus X-1 performed in 2007, for a total exposure time of ~50 ks. The source was observed with the High Res…
Fast aperiodic variability in the black hole binary GRS 1915+105: the timing signature of relativistic ejection events
P. Soleri, T. Belloni, P. Casella
We present X-ray observations of the Black-Hole Binary GRS 1915+105 made with the RXTE (Rossi X-ray Timing Explorer). We concentrated on timing analysis of the strong variability f…
The identification of MAXI J1659-152 as a black hole candidate
M. Kalamkar, J. Homan, D. Altamirano +3
We report on the analysis of all 65 pointed Rossi X-ray Timing Explorer observations of the recently discovered soft X-ray transient MAXI J1659-152 (initially referred to as GRB 10…
The near-infrared counterpart of 4U 1636-53
D. M. Russell, K. O'Brien, T. Muñoz-Darias +3
The optical counterpart of the neutron star X-ray binary and well known X-ray burster, 4U 1636-53 (= 4U 1636-536 = V801 Ara) has been well studied for three decades. However to dat…
INTEGRAL/RossiXTE high-energy observation of a state transition of GX 339-4
T. Belloni, I. Parolin, M. Del Santo +7
On 2004 August 15, we observed a fast (shorter than 10 hours) state transition in the bright black-hole transient GX 339-4 simultaneously with RossiXTE and INTEGRAL. This transitio…
The evolution of the timing properties of the black-hole transient GX 339-4 during its 2002/2003 outburst
T. Belloni, J. Homan, P. Casella +5
We present the results of the timing and color analysis of more than two hundred RXTE/PCA observations of the bright black-hole transient GX 339-4 obtained during its 2002/2003 out…
Infrared timing with SPICA: Probing the formation of stellar-mass compact object jets in real-time
P. Gandhi, D. M. Russell, P. Casella +2
The time domain remains, in many respects, the least explored of parameter spaces in astronomical studies. The purpose of this article is to encourage the SPICA community to consid…
A late jet rebrightening revealed from multi-wavelength monitoring of the black hole candidate XTE J1752-223
D. M. Russell, P. A. Curran, T. Muñoz-Darias +15
We present optical monitoring of the black hole candidate XTE J1752-223 during its 2009 - 2010 outburst and decay to quiescence. The optical light curve can be described by an expo…
Detection of the first infra-red quasi periodic oscillation in a black hole X-ray binary
M. Kalamkar, P. Casella, P. Uttley +5
We present analysis of fast variability of Very Large Telescope/ISAAC (infra-red), \textit{XMM-Newton}/OM (optical) and EPIC-pn (X-ray), and RXTE/PCA (X-ray) observations of the bl…
Swift observations of black hole candidate XTE J1752-223 during outburst
P. A. Curran, P. Casella, T. J. Maccarone +5
Here we summarise the Swift broadband observations of the recently discovered X-ray transient and black hole candidate, XTE J1752-223,obtained over the period of outburst from Octo…
The THESEUS space mission concept: science case, design and expected performances
L. Amati, P. O'Brien, D. Goetz +208
THESEUS is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-…
The complex behaviour of the microquasar GRS 1915+105 in the rho class observed with BeppoSAX. I: Timing analysis
E. Massaro, G. Ventura, F. Massa +5
GRS 1915+105 was observed by BeppoSAX for about 10 days in October 2000. For about 80% of the time, the source was in the variability class , characterised by a series of recur…
The peculiar hard state behaviour of the black hole X-ray binary Swift J1727.81613
A. K. Hughes, F. Carotenuto, T. D. Russell +37
Tracking the correlation between radio and X-ray luminosities during black hole X-ray binary outbursts is a key diagnostic of the coupling between accretion inflows (traced by X-ra…
Rapid Mid-Infrared Spectral-Timing with JWST. I. The prototypical black hole X-ray Binary GRS 1915+105 during a MIR-bright and X-ray-obscured state
P. Gandhi, E. S. Borowski, J. Byrom +44
We present mid-infrared (MIR) spectral-timing measurements of the prototypical Galactic microquasar GRS 1915+105. The source was observed with the Mid-Infrared Instrument (MIRI) on…
Time Domain Astronomy with the THESEUS Satellite
S. Mereghetti, S. Balman, M. Caballero-Garcia +74
THESEUS is a medium size space mission of the European Space Agency, currently under evaluation for a possible launch in 2032. Its main objectives are to investigate the early Univ…
The faint "heartbeats" of IGR J17091-3624: an exceptional black-hole candidate
D. Altamirano, T. Belloni, M. Linares +9
We report on the first 180 days of RXTE observations of the outburst of the black hole candidate IGR J17091-3624. This source exhibits a broad variety of complex light curve patter…
Parsec-Scale Bipolar X-ray Shocks Produced by Powerful Jets from the Neutron Star Circinus X-1
P. H. Sell, S. Heinz, D. E. Calvelo +10
We report the discovery of multi-scale X-ray jets from the accreting neutron star X-ray binary, Circinus X-1. The bipolar outflows show wide opening angles and are spatially coinci…
A wildly flickering jet in the black hole X-ray binary MAXI J1535-571
M. C. Baglio, D. M. Russell, P. Casella +29
We report on the results of optical, near-infrared (NIR) and mid-infrared observations of the black hole X-ray binary candidate (BHB) MAXI J1535-571 during its 2017/2018 outburst.…
The complex time behaviour of the microquasar GRS 1915+105 in the Ï-class observed with BeppoSAX. III: The hard X-ray delay and limit cycle mapping
F. Massa, E. Massaro, T. Mineo +4
The microquasar GRS1915+105 was observed by BeppoSAX in October 2000 for about ten days while the source was in Ï-mode, which is characterized by a quasi-regular type I bursting a…
Discovery of a thermonuclear Type I X-ray burst in infrared: new limits on the orbital period of 4U 1728-34
F. M. Vincentelli, Y. Cavecchi, P. Casella +4
We report the detection of an infrared burst lagging a thermonuclear Type I X-ray burst from the accreting neutron star 4U 1728-34 (GX 354-0). Observations were performed simultane…
Pulsating in unison at optical and X-ray energies: simultaneous high-time resolution observations of the transitional millisecond pulsar PSR J1023+0038
A. Papitto, F. Ambrosino, L. Stella +22
PSR J1023+0038 is the first millisecond pulsar discovered to pulsate in the visible band; such a detection took place when the pulsar was surrounded by an accretion disk and also s…
Radio Frequency Timing Analysis of the Compact Jet in the Black Hole X-ray Binary Cygnus X-1
A. J. Tetarenko, P. Casella, J. C. A. Miller-Jones +5
We present simultaneous multi-band radio and X-ray observations of the black hole X-ray binary Cygnus X-1, taken with the Karl G. Jansky Very Large Array and the Nuclear Spectrosco…