A Search for Time-Variable Features in the Chandra LETGS Spectra of GRB030328 and GRB041006

Details A Search for Time-Variable Features in the Chandra LETGS Spectra of GRB030328 and GRB041006 A Search for Time-Variable Features in the Chandra LETGS Spectra of GRB030328 and GRB041006

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20517902b&link_type=abstract

American Astronomical Society Meeting 205, #179.02; Bulletin of the American Astronomical Society, Vol. 37, p.383

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Claims of low-significance X-ray lines and transient absorption features have been made for several Gamma-ray burst afterglows. If real, these features provide strong diagnostics on the geometry and chemical composition of the circumburst emitting region. We report on a detailed analysis of two recent X-ray afterglow data sets taken with Chandra: GRB030328 and GRB041006. Both are approximately day-long observations with the LETGS, starting within one day of the GRB. We discuss the time dependence of the spectra during each observation. We find no evidence for highly significant, transient spectral features.

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