385 citations · 1.4k across the 35 of their papers we have counts for
35 papers
Self-Consistent Disk-Reflection Analysis of the Black-Hole Candidate X-ray Binary MAXI J1813-095 with NICER, Swift, Chandra, and NuSTAR
Santiago Ubach, James F. Steiner, Jiachen Jiang +5
We present our analysis of MAXI J1813-095 during its hard state ``stalled'' outburst in 2018. This self-consistent analysis has been carried out using \NICER, \Swift, \Chandra, and…
X-ray Reflection from the Plunging Region of Black Hole Accretion Disks
Jameson Dong, Guglielmo Mastroserio, Javier A. Garcıa +3
Accretion around black holes is very often characterized by distinctive X-ray reflection features (mostly, iron inner-shell transitions), which arise due to the primary radiation b…
Variability as a predictor for the hard-to-soft state transition in GX 339-4
Matteo Lucchini, Marina Ten Have, Jingyi Wang +17
During the outbursts of black hole X-ray binaries (BHXRBs), their accretion flows transition through several states. The source luminosity rises in the hard state, dominated by non…
Reflection and timing study of the transient black hole X-ray binary MAXI J1803-298 with NuSTAR
Benjamin M. Coughenour, John A. Tomsick, Guglielmo Mastroserio +9
The transient black hole X-ray binary MAXI J1803-298 was discovered on 2021 May 1, as it went into outburst from a quiescent state. As the source rose in flux it showed periodic ab…
Revisiting the galactic X-ray binary MAXI J1631-479: Implications for high inclination and a massive black hole
Sandeep K. Rout, Santosh Vadawale, Javier Garcia +1
X-ray spectroscopy of galactic black hole binaries serve as a powerful tool to gain an overall understanding of the system. Not only can the properties of the accretion disk be stu…
X-ray Reverberation Mapping of Ark 564 using Gaussian Process Regression
Collin D. Lewin, Erin Kara, Daniel R. Wilkins +15
Ark 564 is an extreme high-Eddington Narrow-line Seyfert 1 galaxy, known for being one of the brightest, most rapidly variable soft X-ray AGN, and for having one of the lowest temp…
NuSTAR spectral analysis beyond 79 keV with stray light
G. Mastroserio, B. W. Grefenstette, P. Thalhammer +10
Due to the structure of the NuSTAR telescope, photons at large off-axis (> 1deg) can reach the detectors directly (stray light), without passing through the instrument optics. At t…
The long-stable hard state of XTE J1752-223 and the disk truncation dilemma
Riley M. T. Connors, Javier A. Garcia, John Tomsick +10
The degree to which the thin accretion disks of black hole X-ray binaries are truncated during hard spectral states remains a contentious open question in black hole astrophysics.…
The NICER "Reverberation Machine": A Systematic Study of Time Lags in Black Hole X-Ray Binaries
Jingyi Wang, Erin Kara, Matteo Lucchini +12
We perform the first systematic search of all NICER archival observations of black hole (and candidate) low-mass X-ray binaries for signatures of reverberation. Reverberation lags…
High-density disc reflection spectroscopy of low-mass active galactic nuclei
L. Mallick, A. C. Fabian, J. A. García +13
The standard alpha-disc model predicts an anti-correlation between the density of the inner accretion disc and the black hole mass times square of the accretion rate, as seen in hi…
MAXI and NuSTAR observations of the faint X-ray transient MAXI J1848-015 in the GLIMPSE-C01 Cluster
Sean N. Pike, Hitoshi Negoro, John A. Tomsick +14
We present the results of MAXI monitoring and two NuSTAR observations of the recently discovered faint X-ray transient MAXI J1848-015. Analysis of the MAXI light-curve shows that t…
Extending the baseline for SMC X-1's spin and orbital behavior with NuSTAR stray light
McKinley C. Brumback, B. W. Grefenstette, D. J. K. Buisson +10
StrayCats, the catalog of NuSTAR stray light observations, contains data from bright X-ray sources that fall within crowded source regions. These observations offer unique addition…
On measuring the Hubble constant with X-ray reverberation mapping of active galactic nuclei
Adam Ingram, Guglielmo Mastroserio, Michiel van der Klis +8
We show that X-ray reverberation mapping can be used to measure the distance to type 1 active galactic nuclei (AGNs). This is because X-ray photons originally emitted from the `cor…
Spectral and Timing Analysis of NuSTAR and Swift/XRT Observations of the X-Ray Transient MAXI J0637-430
Hadar Lazar, John A. Tomsick, Sean N. Pike +10
We present results for the first observed outburst from the transient X-ray binary source MAXI J0637-430. This study is based on eight observations from the Nuclear Spectroscopic T…
Bhjet: a public multi-zone, steady state jet + thermal corona spectral model
M. Lucchini, C. Ceccobello, S. Markoff +7
Accreting black holes are sources of major interest in astronomy, particular those launching jets because of their ability to accelerate particles, and dramatically affect their su…
Modelling correlated variability in accreting black holes: the effect of high density and variable ionisation on reverberation lags
Guglielmo Mastroserio, Adam Ingram, Jingyi Wang +9
We present a new release of the RELTRANS model to fit the complex cross-spectrum of accreting black holes as a function of energy. The model accounts for continuum lags and reverbe…
The Nature of Soft Excess in ESO 362-G18 Revealed by XMM-Newton and NuSTAR Spectroscopy
Yerong Xu, Javier A. García, Dominic J. Walton +3
We present a detailed spectral analysis of the joint XMM-Newton and NuSTAR observations of the active galactic nuclei (AGN) in the Seyfert 1.5 Galaxy ESO 362-G18. The broadband ($0…
Disk, Corona, Jet Connection in the Intermediate State of MAXI J1820+070 Revealed by NICER Spectral-Timing Analysis
Jingyi Wang, Guglielmo Mastroserio, Erin Kara +14
We analyze 5 epochs of NICER data of the black hole X-ray binary MAXI J1820+070 during the bright hard-to-soft state transition in its 2018 outburst with both reflection spectrosco…
Reflection Modeling of the Black Hole Binary 4U~163047: the Disk Density and Returning Radiation
Riley Connors, Javier García, John Tomsick +11
We present the analysis of X-ray observations of the black hole binary 4U~163047 using relativistic reflection spectroscopy. We use archival data from the RXTE, Swift, and NuSTA…
Multi-wavelength detectability of isolated black holes in the Milky Way
Francesca Scarcella, Daniele Gaggero, Riley Connors +3
Isolated black holes in our Galaxy have eluded detection so far. We present here a comprehensive study on the detectability of isolated stellar-mass astrophysical black holes that…
Evidence for Returning Disk Radiation in the Black Hole X-ray Binary XTE J1550-564
Riley M. T. Connors, Javier A. Garcia, Thomas Dauser +7
We explore the accretion properties of the black hole X-ray binary \j1550\ during its outbursts in 1998/99 and 2000. We model the disk, corona, and reflection components of X-ray s…
Evolution of the accretion disk-corona during bright hard-to-soft state transition: A reflection spectroscopic study with GX 339-4
Navin Sridhar, Javier A. García, James F. Steiner +3
We present the analysis of several observations of the black hole binary GX 339--4 during its bright intermediate states from two different outbursts (2002 and 2004), as observed b…
The 2017 Failed Outburst of GX 339-4: Relativistic X-ray Reflection near the Black Hole Revealed by NuSTAR and Swift Spectroscopy
Javier A. García, John A. Tomsick, Navin Sridhar +12
We report on the spectroscopic analysis of the black hole binary GX 339-4 during its recent 2017-2018 outburst, observed simultaneously by the Swift and NuSTAR observatories. Altho…
Conflicting disk inclination estimates for the black hole X-ray binary XTE J1550-564
Riley~M. ~T. ~Connors, Javier~A. ~Garcia, James~F. ~Steiner +7
XTE J1550-564 is a black hole X-ray binary for which the dynamical characteristics are well established, and the broadband spectral evolution of the source has been well studied. I…