X-ray spectral and flux variability of the microquasar GRS 1758−258 on timescales from weeks to years

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Volume 636 (April 2020)

A&A, 636 (2020) A51

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Table 1.

Galactic ridge model parameters.

a_brems, 1	0.011 ± 0.003
kT₁	$8_{- 1}^{+ 3}$ $8^{+3}_{-1}$	keV
a_brems, 2	$0 . 05_{- 0.01}^{+ 0.03}$ $0.05^{+0.03}_{-0.01}$
kT₂	$1 . 2_{- 0.1}^{+ 0.2}$ $1.2^{+0.2}_{-0.1}$	keV

F₁	$(2 . 6_{- 0.4}^{+ 0.3}) \times 10^{- 5}$ $\left(2.6^{+0.3}_{-0.4}\right)\times10^{-5}$	ph s⁻¹ cm⁻²
σ₁	0.05	keV
E₁	6.4	keV
F₂	1.4 × 10⁻⁴	ph s⁻¹ cm⁻²
σ₂	0.05	keV
E₂	6.67	keV
F₃	4 × 10⁻⁵	ph s⁻¹ cm⁻²
σ₃	0.05	keV
E₃	7.0	keV

Notes. a_{brems, 1, 2}: normalization of the bremsstrahlung components; kT_1, 2: plasma temperature; F_1, 2, 3 is the total flux under a Gaussian centered at E_1, 2, 3 with a width σ_1, 2, 3. Values without uncertainties were kept fixed during the fit to the spectra from the background regions. Uncertainties are at the 90% confidence level.

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