Low Upper limits of Iron line Flux in two X-ray afterglow of GRBs with ASCA

Details Low Upper limits of Iron line Flux in two X-ray afterglow of GRBs with ASCA Low Upper limits of Iron line Flux in two X-ray afterglow of GRBs with ASCA

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.3401t&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #34.01; Bulletin of the American Astronomical Society, Vol. 32, p.1244

Astronomy and Astrophysics

Astronomy

Scientific paper

The iron emission line in the X-ray afterglow of GRBs is thought to be a key to understand the environment of progenitors. Two deep observations of X-ray agterglows can be explained by a simple power-law spectra but without any iron emission feature with ASCA. The 90% upper-limit for the iron flux is as low as only 100 eV(EW). This is an order of lower than the previous two observations.

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