Experimental Research on a Fast and Precision Localization on the Astrophysical Gamma-Ray Sources

In high-energy electromagnetic bands, the angular resolution of astronomical detectors is low. When faced with a large number of gamma-ray observations, the researchers are eager to locate the unknown objects quickly, on which many development software will help greatly. In this work, we perform rapid and precise positioning with different selections of time and energy spans on a sort of gamma-ray sources, Gamma-ray Bursts (GRBs), employing the high-energy observational data (>100MeV) from the international telescope of the Fermi Large Area Telescope. The result shows that within a selection of trigger time (T₀) to less than 1000 seconds after T₀ (< T₀+1000s) can the gamma-ray burst be well located. The derived significance map of each GRB implies that the precision location is consistent with the position at the low-energy band by the follow-up observations, which proves the validity of our experimental design.