Observations of X-ray and γ bursts

Abstract

WE report on some bursts of hard X rays seen in March 1976 by the Ariel-V scintillation telescope (ST). The timescale of a few seconds, the correlation with low energy events seen by a proportional counter on the same satellite (ref. 1 and S. J. Bell-Burnell, private communication) and a photon energy > 50 keV, are factors which suggest a connection in origin between the gamma bursts of Klebesadel et al.2 and the X-ray events noticed by Grindlay et al.3. A delayed arrival at high energies seems to be an important feature of our observations.

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References

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    Mason, K. O., Bell-Burnell, S. J., and White, N. E., Nature, 262, 473–474 (1976).

  2. 2

    Klebesadel, R. W., Strong, I. B., and Olson, R. A., Astrophys. J. Lett., 182, L85 (1973).

  3. 3

    Grindlay, J., et al. Astrophys. J. Lett. (in the press).

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    Lewin, W. H. G., et al., Astrophys. J. Lett. (in the press).

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    Cline, T. L., and Desai, U. D., Astrophys. J. Lett., 196, 643 (1975).

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    Bewick, A., Coe, M. J., Mills, J. S., and Quenby, J. J., Nature, 258, 686 (1975).

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