| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
|
|
|---|---|---|
| Page(s) | 433 - 434 | |
| DOI | https://doi.org/10.1051/aas:1999297 | |
| Published online | 15 September 1999 | |
What did ASCA see in the GRB 970828 afterglow?
1
The Institute of Physical and Chemical Research, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan
2
Institute of Space and Astronautical Science, 3-1-1, Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan
Send offprint request to: A. Yoshida
Received:
21
January
1999
Accepted:
5
July
1999
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
(
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 
cm-2 at 
,
together with an emission line at 
keV.
The line could be red shifted Fe K
line.
Hence, it suggests a relatively small red shift
for this GRB.
Key words: gamma-rays: bursts
© European Southern Observatory (ESO), 1999