What did ASCA see in the GRB 970828 afterglow?

Details What did ASCA see in the GRB 970828 afterglow? What did ASCA see in the GRB 970828 afterglow?

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..433y&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.433-434

Astronomy and Astrophysics

Astrophysics

85

Gamma-Rays: Bursts

Scientific paper

The ASCA/ satellite made a quick followup observation of GRB 970828 and detected its fading X-ray afterglow at the position localized by the All-Sky Monitor on the Rossi XTE satellite. Because of the quickness, the afterglow was still rather bright ( ~ 4\ 10(-13) ergs cm(-2) s(-1) : 2-10 keV), and ASCA obtained the data of good quality. We found the spectral features of the absorption which implies a column density of 4.1\ 10(21) cm(-2) at z=0, together with an emission line at ~ 5 keV. The line could be red shifted Fe K_α line. Hence, it suggests a relatively small red shift z ~ 0.33 for this GRB.

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