Automated analysis of Fermi-LAT data to trigger ground-based gamma-ray observations

Details Automated analysis of Fermi-LAT data to trigger ground-based gamma-ray observations Automated analysis of Fermi-LAT data to trigger ground-based gamma-ray observations

2011-10-05

arxiv.org/abs/1110.1036v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 4 figures, to appear in proceedings of the 32nd ICRC, Beijing, China

Scientific paper

The Fermi Gamma-ray Space Telescope regularly surveys the entire sky in the energy range between 0.3 and 100 GeV with an homogeneous coverage. This makes Fermi a very useful guide for ground-based Cherenkov-telescope arrays like VERITAS, that are sensitive at energies above 100 GeV. The VERITAS collaboration uses information from Fermi-LAT to select potential targets and identify flaring objects in the GeV band. We describe three different analysis pipelines that automatically process and analyze Fermi-LAT data on a daily basis to look for flaring objects: daily light curves of selected targets, an all-sky analysis to identify new flaring sources, and an algorithm that looks for clusters of high-energy photons in time and arrival direction.

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