Accounting for the Sun and the Moon in Fermi-LAT Analysis

Understand

The Sun and the Moon are quiescent gamma-ray sources that are clearly detectable in Fermi-LAT data.

• While moving through the sky, the Sun and the Moon can be a significant background in the analysis of Fermi-LAT data if they pass through the region of interest.
• Accurate modeling of their intensity is needed in this case, accounting for the correct exposure of their track along the sky.
• We present the Solar System Tools (SST) which calculate the templates of the Sun's and the Moon's intensity in the sky for a given observing period and a model of their steady emission.