Abstract
We present optical spectroscopy and photometry of 4U 1258-61 obtained over the course of six years. Evidence for the evolution of a circumstellar envelope throughout the course of the observations is presented.
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Corbet, R.H.D., Smale, A.P., Menzies, J.W. et al. The long term variability of 4U 1258-61 (GX304-1). Space Sci Rev 40, 415–419 (1985). https://doi.org/10.1007/BF00179850
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DOI: https://doi.org/10.1007/BF00179850