Speaker
Richard Bartels
(University of Amsterdam)
Description
A clear excess in the Fermi-LAT data is present at energies around a few GeV. The spectrum of this so-called 'GeV excess' is remarkably similar to the expected annihilation signal of WIMP dark matter. However, a large bulge population of sub-detection-threshold millisecond pulsars (MSPs) could also explain the excess spectrum. In a recent work we optimized the search for sub-threshold sources by applying a wavelet transform to the Fermi gamma-ray data. In the Inner-Galaxy the wavelet signal is significantly enhanced, providing supportive evidence for the point source interpretation of the excess. In this talk I will discuss the identification of point sources using a wavelet analysis. In addition, I will compare the performance of the wavelet to other techniques that can be used to identify anisotropies due to point sources, such as the autocorrelation function.
Author
Richard Bartels
(University of Amsterdam)
