Improved Fermi-GBM GRB localizations using BALROG
| Autor: | F. Berlato, J. Michael Burgess, Jochen Greiner |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Systematic error
Physics High Energy Astrophysical Phenomena (astro-ph.HE) 010504 meteorology & atmospheric sciences Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Space and Planetary Science Observatory 0103 physical sciences Astrophysics - High Energy Astrophysical Phenomena Gamma-ray burst 010303 astronomy & astrophysics 0105 earth and related environmental sciences Fermi Gamma-ray Space Telescope |
| DOI: | 10.48550/arxiv.1902.01082 |
| Popis: | The localizations of gamma-ray bursts (GRBs) detected with the Gamma-ray Burst Monitor (GBM) onboard the Fermi satellite are known to be affected by significant systematic errors of 3-15 degrees. This is primarily due to mismatch of the employed Band function templates and the actual GRB spectrum. This problem can be avoided by simultaneously fitting for the location and the spectrum of a GRB, as demonstrated with an advanced localization code, BALROG (arXiv:1610.07385). Here, we analyze in a systematic way a sample of 105 bright GBM-detected GRBs for which accurate reference localizations are available from the Swift observatory. We show that the remaining systematic error can be reduced to $\sim$1-2 degrees. |
| Databáze: | OpenAIRE |
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