BATSE Bright Source Monitor (Pulsed Sources)

Frequency & Flux Histories


Mission-to-date Long-term Summary of transient outbursts


This is a snapshot of the last active data available from the monitor, through May 26, 2000. The data can be accessed here

Compton Gamma Ray Observatory


April 5, 1991 - June 4, 2000


The BATSE Pulsar team has monitored the spin frequency and pulsed flux of about 20 transient accreting X-ray binaries since the beginning of the CGRO mission, and has provided biweekly updates on the web since February 1997. Due to a NASA decision to deorbit the spacecraft, the satellite was destroyed on June 4, 2000. Mission histories for some sources can be selected directly below. We plan to provide additional histories in the future.

CGRO Mission to Date: April 1991 - June 1999

Mission-to-date
Long-term
Summary of
transient outbursts

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4U 1538-52 4U 1626-67 Cen X-3 GX 1+4
GX 301-2 Vela X-1


Long-term Histories: Discovery - June 1999

Mission-to-date
Long-term
Summary of
transient outbursts

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4U 1538-52 4U 1626-67 Cen X-3 GX 1+4
GX 301-2 Vela X-1


Transient Outburst Summary

The plot at right summarizes all outbursts of transient pulsed sources seen by BATSE since launch of the CGRO (using optimal analysis techniques and longer observation intervals than 1 day where necessary, not directly obtained from standard daily Monitor).
Transient Outbursts
(last updated Apr 30,1999)

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Page and plots produced by Bob Wilson (NASA/MSFC)