BATSE Bright Source Monitor (Pulsed Sources)

Vela X-1

Recent Flux & Frequency History

Pulsar HOME
Monitor Parameters
ASCII File

Typical Pulse Profile
PS File
Mission History
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

Pulsar HOME
PS file
FITS file
(FITS readme file)
Recent History
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Long-term History
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

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