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Energy Spectra of X 1636-536 Observed with ASCA

Published online by Cambridge University Press:  25 May 2016

K. Asai ,
T. Dotani ,
K. Mitsuda ,
H. Inoue ,
Y. Tanaka  and
W. H. G. Lewin
K. Asai
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
T. Dotani
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
K. Mitsuda
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
H. Inoue
Affiliation:
Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229, Japan
Y. Tanaka
Affiliation:
SRON Laboratory for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
W. H. G. Lewin
Affiliation:
Massachusetts Institute of Technology, Center for Space Research, 37-627, Cambridge, MA 02139, USA

Extract

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Absorption line features were detected at 4.1 keV from X 1636-536 with the Tenma satellite in the spectra of X-ray bursts (Waki et al., 1984). Similar features were also detected from X 1608-52 and EXO 1747-214 during bursts (Nakamura et al., 1988; Magnier et al., 1989). These features at 4.1 keV may be interpreted as the redshifted Kα absorption line of helium-like iron atoms. However, such interpretation requires extremely soft equation of state for the nuclear matter, and confirmation with high resolution detectors is urged (Lewin et al., 1993). To investigate the line features, we observed X 1636-536 with ASCA for ~ 240 ksec.

Type
Session 3: Diagnostics of High Gravity Objects with X- and Gamma Rays
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 354 - 355
Copyright
Copyright © Kluwer 1998 

References

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