A neural simulation-based inference pipeline applied to 14 years of Fermi-LAT data recovers 98% of bright 4FGL sources, reconstructs the high-latitude source-count distribution in parametric and non-parametric form, and passes calibration and simulator-realism tests.
A New Model For The Loop-I (The North Polar Spur) Region
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abstract
The North Polar Spur (NPS) is the brightest filament of Loop I, a large circular feature in the radio continuum sky. In this paper, a model consisting of two synchrotron emitting shells is presented that reproduces large-scale structures revealed by recent polarization surveys. The polarized emission of the NPS is reproduced by one of these shells. The other shell, which passes close to the Sun, gives rise to polarized emission towards the Galactic poles. It is proposed that X-ray emission seen towards the NPS is produced by interaction of the two shells. Two OB-associations coincide with the centers of the shells. A formation scenario of the Loop I region is suggested.
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A robust neural determination of the source-count distribution of the Fermi-LAT sky at high latitudes
A neural simulation-based inference pipeline applied to 14 years of Fermi-LAT data recovers 98% of bright 4FGL sources, reconstructs the high-latitude source-count distribution in parametric and non-parametric form, and passes calibration and simulator-realism tests.