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X-ray outburst from the direction of the galactic centre

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Abstract

WHEN the Uhuru satellite examined the X-ray emission from the region of the galactic centre in 1971 an extended region of emission centred on the radio source Sgr A and about 2° in extent was observed1. We report here details of a transient point X-ray source, A1742–28, which has been observed at the centre of this region by the Ariel V rotation modulation collimator (RMC) experiment. Its rise to a peak and subsequent decline by a factor of two over 12 d were monitored. The position was found to be α = 17 h 42 min 26.0 ± 4.8 s, δ = −28° 59.8 ± 1.2′ (1950.0 coordinates, 90% confidence limits).

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Authors and Affiliations

  1. Department of Space Research, University of Birmingham, Birmingham, UK

    C. J. EYLES, G. K. SKINNER & A. P. WILLMORE

  2. Mullard Space Science Laboratory, Department of Physics, University College London, UK

    F. D. ROSENBERG

Authors
  1. C. J. EYLES
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  2. G. K. SKINNER
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  3. A. P. WILLMORE
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  4. F. D. ROSENBERG
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EYLES, C., SKINNER, G., WILLMORE, A. et al. X-ray outburst from the direction of the galactic centre. Nature 257, 291–293 (1975). https://doi.org/10.1038/257291a0

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