The quiescent state is the dominant accretion mode for black holes on all mass scales .
Our knowledge of the X-ray spectrum is limited due to the characteristic low luminosity in this state .
Herein , we present an analysis of the sample of dynamically-confirmed stellar-mass black holes observed in quiescence in the Chandra/XMM-Newton/Suzaku era resulting in a sample of 8 black holes with \sim 570 ks of observations .
In contrast to the majority of AGN where observations are limited by contamination from diffuse gas , the stellar-mass systems allow for a clean study of the X-ray spectrum resulting from the accretion flow alone .
The data are characterized using simple models .
We find a model consisting of a power-law or thermal bremsstrahlung to both provide excellent descriptions of the data , where we measure \Gamma = 2.06 \pm 0.03 and kT = 5.03 ^ { +0.33 } _ { -0.31 } ~ { } keV respectively in the 0.3 – 10 keV bandpass , at a median luminosity of L _ { x } \sim 5.5 \times 10 ^ { -7 } ~ { } L _ { Edd } .
This result in discussed in the context of our understanding of the accretion flow onto stellar and supermassive black holes at low luminosities .