Long-term spectral study of the black hole Cygnus X-1 using INTEGRAL

2019/04/19 by F. Cangemi, Cangemi, F., T. Beuchert +19 · 1 citation
Engineering · Physics and Astronomy · #Astrophysical Phenomena and Observations #Particle Accelerators and Free-Electron Lasers #Superconducting Materials and Applications #astro-ph.HE

paper · pdf · doi:10.48550/arxiv.1904.09112

4 pages, 2 figures, 12th INTEGRAL Conference

arxiv created 2019/04/19 · arxiv updated 2019/04/22

Abstract

We utilize the joint capabilities of IBIS and SPI to perform a state-resolved 20--2000 keV analysis of the microquasar Cygnus X-1. In both LHS and HSS, the spectral analysis reveals the presence of a high-energy tail above 400 keV in addition to a standard, Compton-like continuum in the 20--400 keV range. We study the polarisation properties of the hard X-ray radiation, as well as of the polarisation of this high-energy tail. Polarisation is detected in the LHS in agreement with previous work. We find potential variations of the LHS polarisation with time and no polarisation detection in the HSS.

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• A short observational view of black hole X-ray binaries with INTEGRAL

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