diff --git a/airshower_beacon_simulation/ca_period_from_shower.py b/airshower_beacon_simulation/ca_period_from_shower.py
index f95ce61..cdf5b70 100755
--- a/airshower_beacon_simulation/ca_period_from_shower.py
+++ b/airshower_beacon_simulation/ca_period_from_shower.py
@@ -20,7 +20,7 @@ import aa_generate_beacon as beacon
 import lib
 from lib import rit
 
-def find_best_period_shifts_summing_at_location(test_loc, antennas, allowed_ks, period=1, dt=None, period_shift_first_trace=0, plot_iteration_with_shifted_trace=None, fig_dir=None, fig_distinguish=None):
+def find_best_period_shifts_summing_at_location(test_loc, antennas, allowed_ks, period=1, dt=None, period_shift_first_trace=0, plot_iteration_with_shifted_trace=None, fig_dir=None, fig_distinguish=None,snr_str=None):
     """
     Find the best sample_shift for each antenna by summing the antenna traces
     and seeing how to get the best alignment.
@@ -81,7 +81,7 @@ def find_best_period_shifts_summing_at_location(test_loc, antennas, allowed_ks,
         # init figure
         if i in plot_iteration_with_shifted_trace:
             fig, ax = plt.subplots(figsize=figsize)
-            ax.set_title("Traces at ({:.1f},{:.1f},{:.1f}) i={i}/{tot}".format(*test_loc, i=i, tot=N_ant))
+            ax.set_title("Traces at ({:.1g},{:.1g},{:.1g}); i={i}/{tot}".format(*test_loc, i=i, tot=N_ant))
             ax.set_xlabel("Time [ns]")
             ax.set_ylabel("Amplitude")
             ax.plot(t_sum, a_sum)
@@ -108,7 +108,7 @@ def find_best_period_shifts_summing_at_location(test_loc, antennas, allowed_ks,
             if True: # plot best k again
                 ax.plot(t_sum, best_augmented_a, alpha=0.8, label=f'best $k$={best_period_shifts[i]:g}', lw=2)
 
-            ax.legend( ncol=5 )
+            ax.legend(title='period shift $k$; '+snr_str, ncol=5 )
             if fig_dir:
                 fig.tight_layout()
                 fname = path.join(fig_dir, path.basename(__file__) + f'.{fig_distinguish}i{i}' + '.loc{:.1f}-{:.1f}-{:.1f}'.format(*test_loc))
@@ -212,7 +212,7 @@ if __name__ == "__main__":
     ev.antennas = antennas
     # read in snr information
     beacon_snrs = beacon.read_snr_file(beacon_snr_fname)
-    snr_str = f"$\\langle SNR \\rangle$ = {beacon_snrs['mean']: .1e}"
+    snr_str = f"$\\langle SNR \\rangle$ = {beacon_snrs['mean']: .1g}"
 
     # For now only implement using one freq_name
     freq_names = antennas[0].beacon_info.keys()
@@ -412,7 +412,8 @@ if __name__ == "__main__":
             # Find best k for each antenna
             ks_per_loc[i], maxima_per_loc[i] = find_best_period_shifts_summing_at_location(test_loc, ev.antennas, allowed_ks, period=1/f_beacon, dt=dt,
                     plot_iteration_with_shifted_trace=[ 5, len(ev.antennas)-1],
-                    fig_dir=tmp_fig_subdir, fig_distinguish=f"run{r}.")
+                    fig_dir=tmp_fig_subdir, fig_distinguish=f"run{r}.",
+                    snr_str=snr_str)
 
         xx = np.array(xx)
         yy = np.array(yy)