Abstract
IN a recent sounding rocket flight in the southern hemisphere (launched from Woomera, South Australia, on November 11, 1970) the X-ray source Cygnus X1 was observed by a 1,000 cm2 collimated proportional counter sensitive to X-rays in the range 2–14 keV. Each X-ray event was indicated through the telemetry link by a 300 µs analogue pulse whose height was proportional to the incoming photon energy. This method of data transmission allows good timing accuracy together with a reasonable spectral resolution.
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References
Boldt, E. A., Holt, S. F., and Serlemitsos, P. J., Astrophys. J. Lett., 164, L9 (1971).
Manchada, R. K., Iyengar, V. S., Agrawal, P. C., Gokhale, G. S., Kunte, P. K., and Sreekantan, B. V., Nature Physical Science, 232, 190 (1971).
Holt, S. F., Boldt, E. A., Schwartz, D. A., Serlemitsos, P. J., and Bleach, R. D., Astrophys. J. Lett., 166, L65 (1971).
Oda, M., Gorenstein, P., Gursky, H., Kellogg, E., Schreier, E., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 166, L1 (1971).
Gursky, H., Gorenstein, P., Kerr, S. J., and Grayzeck, E. J., Astrophys. J. Lett., 167, L15 (1971).
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CRUISE, A., NEWTON, A. & CHAPMAN, C. Short Term Variability of Pulsations in the X-ray Flux from Cygnus X1. Nature 233, 468–469 (1971). https://doi.org/10.1038/233468a0
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DOI: https://doi.org/10.1038/233468a0
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