Typical Pulse Profile
Recent Flux & Frequency History

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Monitor Parameters
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ASCII File
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PS File
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Mission History
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Long-term History
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Eclipses in Vela X-1 are not accounted for in the plot above. This results in
2 days of non-detection every (8.96 day) orbital period, and can affect the plotted flux values in the days adjacent to the eclipse.

CGRO/BATSE Mission Frequency History

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PS file
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FITS file
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(FITS readme file)
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Recent History
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Long-term History
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Data for the above plot are obtained from an enhanced analysis. Two frequency measurements per system orbit are made, with times of eclipse excluded.

Long-term Frequency History

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PS file
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Mission History
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Recent History
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The same BATSE data is plotted here, along with measurements of the source made since discovery of pulsations.
