A Radiative Recombination Edge in the X-ray Afterglow of GRB 970828, and Non-Equilibrium Ionization States

Details A Radiative Recombination Edge in the X-ray Afterglow of GRB 970828, and Non-Equilibrium Ionization States A Radiative Recombination Edge in the X-ray Afterglow of GRB 970828, and Non-Equilibrium Ionization States

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..662..383y&link_type=abstract

GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceed

Astronomy and Astrophysics

Astronomy

1

Gamma-Ray Sources, Gamma-Ray Bursts, X-Ray Sources, X-Ray Bursts, X-Ray

Scientific paper

We observed the X-ray afterglow of GRB 970828 with the Japanese X-ray satellite ASCA. The spectral data displayed a hump around ~ 5 keV. This hump structure is likely a recombination edge of iron in the vicinity of the source, taking into account the redshift z = 0.9578 found for the likely host galaxy of the associated radio flare. The Radiative Recombination Edge and Continuum model can interpret the spectrum as coming from a highly ionized plasma in a non-equilibrium ionization state.

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