Improve minimize setup

bilby/core/sampler/ptemcee.py

@@ -126,12 +126,12 @@ class Ptemcee(MCMCSampler):
             likelihood_copy.parameters.update(draw)
             x0 = [draw[key] for key in minimize_list]
             res = minimize(
-                neg_log_like, x0, bounds=bounds, method='L-BFGS-B')
+                neg_log_like, x0, bounds=bounds, method='L-BFGS-B', tol=1e-15)
             if res.success:
                 success.append(res.x)
             if trials > 100:
                 raise SamplerError("Unable to set pos0 from minimize")
-            if len(success) >= 3:
+            if len(success) >= 10:
                 break
 
         success = np.array(success)