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A Hard X-ray Observation of CYG X-1 in 1985

  • Y.Q. Ma (a1), G.H. Li (a1), C.M. Zhang (a1), Q.Y. Xiao (a1), Y.M. Qian (a1), Z.G. Li (a1), M. Wu (a1), CJ. Dai (a1), Y.D. Gu (a1), X.Y. Zhang (a1) and T.P. Li (a1)...

Extract

On September 22, 1985, a hard X-ray observation of Cyg X-1 was performed by using a balloon-borne CsI-NaI phoswich telescope HAPI-2 at Xianghe Balloon Facility in China. The main detector is CsI(T1) with a thickness of 0.4cm and an area of 140cm2. The energy range is 20–200KeV. The telescope reached a float altitude of about 38Km(4g/cm2). The photon's arrival time and energy loss spectrum were measured for both background and active tracking on-source observations.

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Copyright

References

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Ling, J.C. et al., Ap. J., 275 (1983) 307.
Matteson, , et al, 1975, NASA SP-389.
Nolan, P. L. et al, Ap. J., 265 (1983) 389.
Steinle, H. et al. A. Ap., 107 (1982) 350.
Watanabe, H., RUP 85-2, 1985.

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