Ulysses GRB Integral 0.5-Second Omnidirectional Counting Rates

Ulysses Gamma Ray Burst experiment data contains integral 0.5-second omnidirectional counting rates from two hemispherical CsI scintillator detectors covering 4 pi steradians. The National Aeronautics and Space Administration instrument operates in the nominal 25-150 keV energy range and is sensitive to solar and cosmic x- and gamma-ray bursts, as well as solar protons and electrons. Data time resolution varies between 0.25, 0.5, 1, or 2 seconds depending on telemetry rate and mode.

Use Cases

• Detecting solar x- and gamma-ray bursts based on count rate increases
• Studying cosmic gamma-ray bursts based on short-duration count rate spikes
• Analyzing solar proton and electron events based on prolonged count rate increases
• Identifying data artifacts like processing spikes and dropouts based on telemetry rate changes

Strengths

• Continuous operation with 4 pi steradian coverage
• Nominal energy range of 25-150 keV
• Time resolution can be as fine as 0.25 seconds

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download
• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Data collected from the Ulysses Gamma Ray Burst experiment's two hemispherical CsI scintillator detectors.