  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 modeling of the diffuse background, and background-independent methods.
In this work we 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. We test PGWave, not only for source detection, but especially to
estimate the flux without the need of a background model. We use Monte Carlo
(MC) simulation to study the accuracy of PS detection and estimation of the
flux. We present preliminary results of these MC studies.
