A simultaneous fit of (all) GRO J1008-57's spectra

Presentation duration: 15 minutes

Presenter: Matthias Kühnel

Parallel computing and steadily increasing computation speed lead to a new tool for analyzing X-ray spectra of accreting neutron stars: simultaneous fitting of a complete dataset of an outburst. We discuss the terminology and implementation based on the Interactive Spectral Interpretation System (ISIS). Applying this tool to the transient X-ray binary GRO J1008-57 we find that the spectrum is defined by the X-ray flux only. Using this technique, time independent parameters such as, e.g., detector calibration constants can be determined with previously unachievable precision.

Sebastian Müller
Ingo Kreykenbohm
Fritz Schwarm
Christoph Großberger
Thomas Dauser
Katja Pottschmidt
Carlo Ferrigno
Richard E. Rothschild
Dmitry Klochkov
Rüdiger Staubert
Jörn Wilms