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The table BH_XBs_NuSTAR_reflection_results.csv contains the results of the spectral analysis of 245 NuSTAR observations of accreting black hole X-ray binaries. The work leading to these results was presented in Draghis et al. (2024). These results were explored in detail in Draghis et al. 2025 (under review). If you use this table in your work, we ask that you reference these two papers.
Table last updated: May 20, 2025.
The data can be downloaded by clicking the button above, or from here.
The values in the table represent the modes and +/- 1 sigma credible intervals of the posterior probability distributions obtained from MCMC runs on the best-performing spectral model in terms of statistic. Each line represents one observation. The meaning of the columns is explained below. Empty entries indicate that either the model used for a specific observation did not include the component associated with the column (e.g. tbabs, diskbb, zxipcf, apec, gaussian), or that the particular flavor of relxill does not contain said parameter (as an example, relxillD will not have entries for 'h', 'Ecut', or 'kTe', and relxilllp will not have entries for 'Index1', 'Index2', or 'Rbr').
Note that "_A" and "_B" denote the parameters obtained for spectra from NuSTAR's FPMA and FPMB detectors. This is used to distinguish between the normalizations of the components, as they were allowed to vary freely between the spectra from the two detectors. For normalizations, "_a", "_d", "_r", and "_g" denote the values for the apec (where present), diskbb, relxill, and gauss components in the model, respectively. An empty value in the table indicates that the component was not included in the model. For the gauss component, the normalization was linked between FPMA and FPMB.
For parameter values, the columns with names ending in "_p" and "_m" contain the plus and minus 1 sigma values of the credible intervals for the parameter.
Description of columns
Description of columns
Source : Common name of the source. Note that the same source can have multiple observations (multiple lines)
ObsID : ID of the NuSTAR observation used
MJD : Date of the observation (in MJD)
Exposure : Exposure duration of the observation (in s)
refl_flavor : Which relxill flavor performed best in terms of statistic. Can be relxill/relxillCp/relxilllp/relxillD
full_model : Complete model used in the spectral analysis, in xspec language
nH : equivalent hydrogen column (in units of $10^{22}$ atoms cm$^{-2}$) in the TBabs component
Nh : column density (in units of $10^{22}$ atoms cm$^{-2}$) in the zxipcf component
log_xi : log of ionization in the zxipcf component
CvrFract : covering fraction f in the zxicpf component
z : redshift of the zxipcf component
kT : plasma temperature (keV) of the apec component
Abundanc : metal abundance in the apec component
Redshift : redshift of the apec component
norm_a_A : normalization of the apec component for the FPMA spectrum
norm_a_B : normalization of the apec component for the FPMB spectrum
Tin : temperature at inner disk radius (keV) for the diskbb component
norm_d_A : normalization of the diskbb component for the FPMA spectrum
norm_d_B : normalization of the diskbb component for the FPMB spectrum
Index1 : inner emissivity q_1 in the relxill(x) component
Index2 : outer emissivity q_2 in the relxill(x) component
Rbr : breaking radius (r_g) in the emissivity profile in the relxill(x) component
h : coronal height (r_g) in the relxilllp component
a : BH spin in the relxill(x) component
Incl : viewing inclination (degrees) in the relxill(x) component, as measured between the line of sight and the normal to the plane of the disk
gamma : power law index of the incident spectrum in the relxill(x) component
logxi : ionization of the accretion disk in the relxill(x) component
Afe : iron abundance (in units of solar abundance) in the in the relxill(x) component
Ecut : high energy cutoff (keV) in the in the relxill(x) component
kTe : coronal temperature (keV) in the in the relxillCp component
logN : the density of the accretion disk (cm$^{-2}) in the relxillD component. Note: no uncertainties.
refl_frac : reflection fraction in the relxill(X) component
norm_r_A : normalization of the relxill(X) component for the FPMA spectrum
norm_r_B : normalization of the relxill(X) component for the FPMB spectrum
LineE : line energy (keV) in the gauss component
Sigma : line width (keV) in the gauss component
norm_g_A : normalization of the gauss component for the FPMA spectrum
chi_2 : mode of the chi2 distribution in the MCMC run. Will generally be larger than the one obtained from the spectral fit.
chi_2_fit : chi^2 value obtained from the best-performing spectral fit. Note: no uncertainties.
dof : Number of degrees of freedom in the spectral fit. Note: no uncertainties.
reflection_strength : reflection strength during the observation, calculated as the ratio between the reflected flux and the total flux in the 3-79 keV band, normalized so that the sum of the reflection strengths for all observations of the same source equals to 1. For sources with a single observation, the value will be equal to 1. To obtain the "true" value of this parameter, one can calculate it as 1-flux_continuum_3_79/flux_3_79. Not to be confused with the reflection fraction, which is a parameter in the relxill(X) models. Note: no uncertainties.
flux_3_79 : Unabsorbed flux in the 3-79 keV band. Note: no uncertainties.
flux_continuum_3_79 : Unabsorbed continuum flux (reflection excluded) in the 3-79 keV band. Note: no uncertainties.
flux_3_5 : Unabsorbed flux in the 3-5 keV band. Note: no uncertainties.
flux_5_10 : Unabsorbed flux in the 5-10 keV band. Note: no uncertainties.
flux_10_20 : Unabsorbed flux in the 10-20 keV band. Note: no uncertainties.
flux_20_79 : Unabsorbed flux in the 20-79 keV band. Note: no uncertainties.
Complete correlation matrix of all the parameters in the spectral models used to fit the 245 NuSTAR spectra presented in this work. The numbers in each cell represent the Spearman correlation coefficient for the given combination of parameters. Redder colors represent stronger positive correlations, and bluer colors indicate stronger negative correlations.
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