Time Resolved Spectroscopy of SGR J1550-5418 Bursts Detected with Fermi/Gamma-Ray Burst Monitor

@article{Younes2014TimeRS,
  title={Time Resolved Spectroscopy of SGR J1550-5418 Bursts Detected with Fermi/Gamma-Ray Burst Monitor},
  author={George Younes and Chryssa Kouveliotou and A. J. Horst and Matthew G. Baring and Jonathan Granot and Anna L. Watts and P. N. Bhat and Andrew C. Collazzi and Neil A. Gehrels and Nicholas M. Gorgone and Ersin Goğuş and David Gruber and Samuel K. Grunblatt and Daniela Huppenkothen and Yuki Kaneko and A. von Kienlin and Michiel van der Klis and L. C. C. Lin and Julie Mcenery and Thijs van Putten and Ralph Wijers},
  journal={The Astrophysical Journal},
  year={2014},
  volume={785},
  pages={52-63}
}
We report on a time-resolved spectroscopy of the 63 brightest bursts of SGR J1550–5418, detected with the Fermi/Gamma-ray Burst Monitor during its 2008-2009 intense bursting episode. We performed spectral analysis down to 4 ms timescales to characterize the spectral evolution of the bursts. Using a Comptonized model, we find that the peak energy, E peak, anti-correlates with flux, while the low-energy photon index remains constant at ~ – 0.8 up to a flux limit F 10–5 erg s–1 cm–2. Above this… 

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