Rigel Cappallo
YOU?
Author Swipe
View article: A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors – II. Model priors and posterior odds
A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors – II. Model priors and posterior odds Open
The reliable detection of the global 21-cm signal, a key tracer of Cosmic Dawn and the Epoch of Reionization, requires meticulous data modelling and robust statistical frameworks for model validation and comparison. In Paper I of this seri…
View article: A general Bayesian model-validation framework based on null-test evidence ratios, with an example application to global 21-cm cosmology
A general Bayesian model-validation framework based on null-test evidence ratios, with an example application to global 21-cm cosmology Open
Comparing composite models for multicomponent observational data is a prevalent scientific challenge. When fitting composite models, there exists the potential for systematics from a poor fit of one model component to be absorbed by anothe…
View article: A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors -- II. Model priors and posterior odds
A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors -- II. Model priors and posterior odds Open
The reliable detection of the global 21-cm signal, a key tracer of Cosmic Dawn and the Epoch of Reionization, requires meticulous data modelling and robust statistical frameworks for model validation and comparison. In Paper I of this seri…
View article: A general Bayesian model-validation framework based on null-test evidence ratios, with an example application to global 21-cm cosmology
A general Bayesian model-validation framework based on null-test evidence ratios, with an example application to global 21-cm cosmology Open
Comparing composite models for multi-component observational data is a prevalent scientific challenge. When fitting composite models, there exists the potential for systematics from a poor fit of one model component to be absorbed by anoth…
View article: Pulse-profile Modeling and Spin–Orbit Alignment in a Suzaku Sample of Accreting X-Ray Binary Pulsars
Pulse-profile Modeling and Spin–Orbit Alignment in a Suzaku Sample of Accreting X-Ray Binary Pulsars Open
We report pulse-profile modeling of a sample of 23 X-ray binary pulsars observed with the Suzaku X-ray satellite. These pulsars have spin periods ranging from 0.7 to 9400 s, and their X-ray emission is powered by the accretion from their s…
View article: A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors – I. Mathematical formalism
A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors – I. Mathematical formalism Open
Accurately accounting for spectral structure in spectrometer data induced by instrumental chromaticity on scales relevant for detection of the 21-cm signal is among the most significant challenges in global 21-cm signal analysis. In the pu…
View article: Probing the Stellar Wind of the Wolf-Rayet Star in IC 10 X-1
Probing the Stellar Wind of the Wolf-Rayet Star in IC 10 X-1 Open
IC 10 X-1 is an eclipsing high mass X-ray binary (HMXB) containing a stellar-mass black hole (BH) and a Wolf-Rayet (WR) donor star with an orbital period of P = 34.9 hr. This binary belongs to a group of systems that can be the progenitors…
View article: Probing the Stellar Wind of the Wolf–Rayet Star in IC 10 X-1
Probing the Stellar Wind of the Wolf–Rayet Star in IC 10 X-1 Open
IC 10 X-1 is an eclipsing high-mass X-ray binary containing a stellar-mass black hole (BH) and a Wolf–Rayet (WR) donor star with an orbital period of P = 34.9 hr. This binary belongs to a group of systems that can be the progenitors of gra…
View article: Analytic approximations of scattering effects on beam chromaticity in 21-cm global experiments
Analytic approximations of scattering effects on beam chromaticity in 21-cm global experiments Open
Scattering from objects near an antenna produce correlated signals from strong compact radio sources in a manner similar to those used by the Sea Interferometer to measure the radio source positions using the fine frequency structure in th…
View article: A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors -- I. Mathematical formalism
A Bayesian approach to modelling spectrometer data chromaticity corrected using beam factors -- I. Mathematical formalism Open
Accurately accounting for spectral structure in spectrometer data induced by instrumental chromaticity on scales relevant for detection of the 21-cm signal is among the most significant challenges in global 21-cm signal analysis. In the pu…
View article: Analytic Approximations of Scattering Effects on Beam Chromaticity in 21‐cm Global Experiments
Analytic Approximations of Scattering Effects on Beam Chromaticity in 21‐cm Global Experiments Open
Scattering from objects near an antenna produce correlated signals from strong compact radio sources in a manner similar to those used by the “Sea Interferometer” to measure the radio source positions using the fine frequency structure in …
View article: Modeling the Luminosity-dependent Pulse Profile and Emission Geometry of SMC X-2 during a Giant Outburst
Modeling the Luminosity-dependent Pulse Profile and Emission Geometry of SMC X-2 during a Giant Outburst Open
One of the brightest X-ray pulsars in the Small Magellanic Cloud is SMC X-2. During its most recent major outburst in 2015, this transient pulsar displayed significant changes in both its accretion state and magnetosphere, particularly whe…
View article: Variable Magellanic HMXB Sources versus Variable ULX Sources: Nothing to Brag about the ULX Sources
Variable Magellanic HMXB Sources versus Variable ULX Sources: Nothing to Brag about the ULX Sources Open
We carry out a meta-analysis of ultraluminous X-ray (ULX) sources that show large variabilities (by factors of >10) between their highest and lowest emission states in the X-ray energy range of 0.3–10 keV. We are guided by a recent stringe…
View article: On the Geometry of the X-ray emission from pulsars a consistent inclination and beaming solution for the Be/X-ray pulsar SXP 1062
On the Geometry of the X-ray emission from pulsars a consistent inclination and beaming solution for the Be/X-ray pulsar SXP 1062 Open
SXP 1062 is a long-period X-ray pulsar (XRP) with a Be optical companion located in the Small Magellanic Cloud. First discovered in 2010 from XMM–Newton data, it has been the target of multiple observational campaigns due to the seeming in…
View article: On the Geometry of the X-Ray Emission from Pulsars. I. Model Formulation and Tests
On the Geometry of the X-Ray Emission from Pulsars. I. Model Formulation and Tests Open
X-ray pulsars are complex magnetized astronomical objects in which many different attributes shape the pulse profiles of the emitted radiation. For each pulsar, the orientation of the spin axis relative to our viewing angle, the inclinatio…