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• W4385429691 abstract "We present a maximum likelihood (ML) algorithm that is fast enough to detect gamma-ray transients in real time on low-performance processors often used for space applications. We validate the routine with simulations and find that, relative to algorithms based on excess counts, the ML method is nearly twice as sensitive, allowing detection of 240-280% more short gamma-ray bursts. We characterize a reference implementation of the code, estimating its computational complexity and benchmarking it on a range of processors. We exercise the reference implementation on archival data from the Fermi Gamma-ray Burst Monitor (GBM), verifying the sensitivity improvements. In particular, we show that the ML algorithm would have detected GRB 170817A even if it had been nearly four times fainter. We present an ad hoc but effective scheme for discriminating transients associated with background variations. We show that the on-board localizations generated by ML are accurate, but that refined off-line localizations require a detector response matrix with about ten times finer resolution than is current practice. Increasing the resolution of the GBM response matrix could substantially reduce the few-degree systematic uncertainty observed in the localizations of bright bursts." @default.
• W4385429691 created "2023-08-01" @default.
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• W4385429691 date "2023-07-31" @default.
• W4385429691 modified "2023-10-18" @default.
• W4385429691 title "Real-time Likelihood Methods for Improved γ-Ray Transient Detection and Localization" @default.
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• W4385429691 doi "https://doi.org/10.3847/1538-4357/acdd72" @default.
• W4385429691 hasPublicationYear "2023" @default.
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