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

  title={X-ray spectral and flux variability of the microquasar GRS 1758−258 on timescales from weeks to years},
  author={Maria Hirsch and Katja Pottschmidt and David M. Smith and Arash Bodaghee and Marion Cadolle Bel and Victoria Grinberg and Natalie Hell and Felicia Krau{\ss} and Ingo Kreykenbohm and Anne M. Lohfink and Michael A. Nowak and Barbara Rodrigues and Roberto Soria and John A. Tomsick and J{\"o}rn Wilms},
  journal={Astronomy \& Astrophysics},
We present the spectral and timing evolution of the persistent black hole X-ray binary GRS 1758−258 based on almost 12 years of observations using the Rossi X-ray Timing Explorer Proportional Counter Array. While the source was predominantly found in the hard state during this time, it entered the thermally dominated soft state seven times. In the soft state GRS 1758−258 shows a strong decline in flux above 3 keV rather than the pivoting flux around 10 keV more commonly shown by black hole… 
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