Yoshida, A.,
Namiki, M.,
Otani, C.,
河合 誠之,
Murakami, T.,
Ueda, Y.,
Shibata, R.,
Uno, S..
英文:
Yoshida, A.,
Namiki, M.,
Otani, C.,
Kawai, N.,
Murakami, T.,
Ueda, Y.,
Shibata, R.,
Uno, S..
言語
English
掲載誌/書名
和文:
英文:
Advances in Space Research
巻, 号, ページ
Vol. 25
pp. 761-764
出版年月
2000年
出版者
和文:
英文:
会議名称
和文:
英文:
開催地
和文:
英文:
アブストラクト
A gamma-ray burst of 28 August 1997 (GRB970828) was localized by the All-Sky Monitor on the Rossi XTE satellite soon after the GRB. ASCA made a quick followup observation receiving the burst alert from RXTE, and detected a fading X-ray afterglow in its error box. Because of its quickness the afterglow was still rather bright (~ 5 × 10-13 ergs cm-2 s-1: 2-10 keV), and ASCA obtained the data of good quality. Its light curve displays significant variation while the entire data appears to be consistent with a simple decay represented by t-1.4 considering together the flux given by the PCA/RXTE scan at an earlier period. We found the spectral features of the absorption due to the matter presumably near the GRB, which implies an uncorrected column depth of 4.1 × 1021 cm-2
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