On-board GRB trigger algorithms of SVOM-GRM

TL;DR

This paper investigates on-board trigger algorithms for the Gamma-Ray Monitor on SVOM, analyzing their efficiency, threshold, and ability to distinguish GRBs from solar flares to improve real-time detection of gamma-ray bursts.

Contribution

It presents a detailed analysis of trigger algorithms for GRM, including threshold setting, efficiency, and flare discrimination methods, enhancing on-board GRB detection capabilities.

Findings

Trigger thresholds and efficiencies are quantified for GRM.

GRM's ability to distinguish solar flares from GRBs is evaluated.

Comparison of GRM and ECLAIRs trigger characteristics is provided.

Abstract

GRM (Gamma-Ray Monitor) is the high energy detector on-board the future Chinese-French satellite SVOM (Space-based multi-band astronomical Variable Object Monitor) which is dedicated to Gamma-Ray Burst (GRB) studies. This paper presents the investigation of the on-board counting rate trigger algorithms of GRM. The trigger threshold and trigger efficiency based on the given GRB sample are calculated with the algorithms. The trigger characteristics of GRM and ECLAIRs are also analyzed. In addition, the impact of solar flares on GRM is estimated, and the method to distinguish solar flares from GRBs is investigated.