Kotani, T.,
河合 誠之,
Nagase, F.,
Namiki, M.,
Sakano, M.,
Takeshima, T.,
Ueda, Y.,
Yamaoka, K.,
Hjellming, R. M..
英文:
Kotani, T.,
Kawai, N.,
Nagase, F.,
Namiki, M.,
Sakano, M.,
Takeshima, T.,
Ueda, Y.,
Yamaoka, K.,
Hjellming, R. M..
言語
English
掲載誌/書名
和文:
英文:
Astrophysical Journal
巻, 号, ページ
Vol. 543
pp. L133-L136
出版年月
2000年11月
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
XTE J1748-288 is a new X-ray transient with a one-sided radio jet. It was observed with ASCA on 1998 September 6 and 26, 100 days after the onset of the radio X-ray outburst. The spectra were modeled with an attenuated power-law model, and the absorbed 2-6 keV flux was 4.6+1.0-0.8×10-11 and 2.2+0.8-0.6×10-12 ergs s-1 cm-2 on 1998 September 6 and 26, respectively. The light curve shows that the steady exponential decay, with an e-folding time of 14 days, lasted over 100 days and 4 orders of magnitude from the peak of the outburst. The celestial region including the source was observed with ASCA on 1993 October 1 and 1994 September 22, years before the discovery. During those periods, the flux was <~10-13 ergs s-1 cm-2, below the ASCA detection limit. The jet blob colliding with the environmental matter is probably not the X-ray source, although the emission mechanism is not determined. A possible detection of a K line from highly ionized iron is discussed.
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