Spectral fits to the 1999 Aql X-1 outburst data

  title={Spectral fits to the 1999 Aql X-1 outburst data},
  author={Thomas J. MaccaronePaolo S. Coppi},
  journal={Astronomy and Astrophysics},
We present analysis and spectral fits of the RXTE data from the May/June 1999 outburst of Aql X-1. These data include observations in the rising portion of the hard state, in the soft state, and in the falling portion of the hard state. We show that the data can be fit by a purely thermal Comptonization model for all the observations, but that more complicated models cannot be ruled out. Up to 60% of the corona's power in the soft state may be injected into non-thermal electrons. The soft state… 

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