Giacomo Principe Erlangen

Point Source Detection and Flux Determination with PGWave (pdf)

One of the largest uncertainties in the Point Source (PS) studies, at Fermi-LAT energies, is the uncertainty in the diffuse background. In general there are two approaches for PS analysis: background-dependent methods, that include modelling of the diffuse background, and background-independent methods. In this work I study PGWave, which is one of the background-independent methods, based on wavelet filtering to find significant clusters of gamma rays. PGWave is already used in the Fermi-LAT catalog pipeline for finding candidate sources. I test PGWave, not only for source detection, but especially to estimate the flux without the need of a background model. I use Monte Carlo (MC) simulation to study the accuracy of PS detection and estimation of the flux. We present results of these MC studies. Further we also present the results of PGWave for 7 years of Fermi-LAT Pass8 data and the comparison with the existing catalog.