Abstract
Evidence is presented that the 283 s pulsar in the X-ray binary system Vela X-1 radiates TeV x-rays. The observations taken over one month indicate a time-averaged flux of 2.2x10-11 x cm-2 s-l with a probability that it is due to chance of 6x10-5. On 4 May 1986 a periodic outburst occured with a maximum flux of 9.3x10-11 x cm-2 s-1. The 283 s modulated outburst was directly observable in the counting rate and the probability for occurrence due to chance is 2.5x10-5. In both these cases a broad, unsymmetric light curve was observed, consistent with X-ray information on this source and results on the two other binaries emitting TeV x-rays.
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North, A.R., de Jager, O.C., Raubenheimer, B.C., van Tonder, A.J., van Urk, G. (1987). Pulsed TeV Gamma Rays from Vela X-1. In: Turver, K.E. (eds) Very High Energy Gamma Ray Astronomy. NATO ASI Series, vol 199. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3831-1_25
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DOI: https://doi.org/10.1007/978-94-009-3831-1_25
Publisher Name: Springer, Dordrecht
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