Changed exoiris.fit_white to use global optimizer before a local opti…

…mizer.

exoiris/exoiris.py

@@ -464,9 +464,16 @@ def plot_setup(self, figsize: tuple[float, float] | None =None, xscale: str | No
         fig.tight_layout()
         return fig
 
-    def fit_white(self) -> None:
-        """Fit a white light curve model and sets the out-of-transit mask."""
+    def fit_white(self, niter: int = 500) -> None:
+        """Fit a white light curve model and sets the out-of-transit mask.
+
+        Parameters
+        ----------
+        niter : int, optional
+            The number of iterations for the global optimization algorithm (default is 500).
+        """
         self._wa = WhiteLPF(self._tsa)
+        self._wa.optimize_global(niter, plot_convergence=False, use_tqdm=False)
         self._wa.optimize()
         pv = self._wa._local_minimization.x
         self.period = pv[1]