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X-ray outburst from Circinus X-1

Nature volume 261, pages 295–296 (1976)Cite this article

Abstract

DURING observations of the Circinus–Norma region by the rotation modulation collimator (RMC) experiment on board Ariel V, a sudden strong X-ray outburst was detected from Cir X-1. The source appeared on 1976 February 15 at 0500(UT) at an intensity of 20 counts s−1. It gradually brightened to over 40 counts s−1 on February 17 at 2200(UT) and then rapidly declined on February 18. Our best position, RA = 229. 19°, Dec = −57.00°, with Error Circle, 0.02° radius (90% confidence), is in excellent agreement with the known position1 of Cir X-1.

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References

  1. Jones, C., Giacconi, R., Forman, W., and Tananbaum, H., Astrophys. J. Lett., 191, L71–L74 (1974).

    Article  ADS  Google Scholar 

  2. Margon, B., et al., Astrophys. J. Lett., 169, L23–L25 (1971).

    Article  ADS  Google Scholar 

  3. Luyendyk, A. P. J., Fenton, K. B., Fenton, A. G., and Broderick, A. J., Proc. 13th Int. Cosmic Ray Conf., 5, 3039 (1973).

    ADS  Google Scholar 

  4. Baity, W. A., Ulmer, M. P., and Peterson, L. E., Astrophys. J., 198, 447 (1975).

    Article  ADS  Google Scholar 

  5. Canizares, C. R., Li, F. K., and Clark, G. W., Astrophys. J. Lett., 191, L75–L76 (1974).

    Article  ADS  Google Scholar 

  6. Spada, G., Bradt, H., Doxsey, R., Levine, A., and Rappaport, S., Astrophys. J. Lett., 190, L113 (1974).

    Article  ADS  Google Scholar 

  7. Davison, P. J. N., and Tuohy, I. R., Mon. Not. R. astr. Soc., 173, 33P–35P (1975).

    Article  ADS  Google Scholar 

  8. Jernigan, G., IAU Circ., No. 2817 (1975).

  9. Clark, D. H., Parkinson, J. H., and Caswell, J. L., Nature, 254, 674 (1975).

    Article  ADS  Google Scholar 

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Authors and Affiliations

  1. Department of Space Research, University of Birmingham, PO Box 363, Birmingham, B15 2TT, UK

    A. M. WILSON & G. F. CARPENTER

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  1. A. M. WILSON
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  2. G. F. CARPENTER
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WILSON, A., CARPENTER, G. X-ray outburst from Circinus X-1. Nature 261, 295–296 (1976). https://doi.org/10.1038/261295a0

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