diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index c07990bc97a0fa6f7718b111a26f419601dff34e..3d37fbd0e5f9c6772307e365567e0f1189985dd4 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1713,7 +1713,9 @@ class MCIsimulator():
         theta = rotTelPos - rotSkyPos          
         
         ############ load star data catlog #####################            
-        starcat='selection_20230517_concat.csv'
+        ##starcat='selection_20230517_concat.csv'
+        
+        starcat='star_catlog'
         
         ##starcat='GaiaSource_675688-675713.csv'
              
@@ -1724,9 +1726,6 @@ class MCIsimulator():
         
         
         ####
-        #df=df0.fillna(1000)
-        #df2=df[ (df['phot_rp_mean_mag']>16)&(df['phot_bp_mean_mag']>16) & (df['phot_bp_mean_mag']<31) & (df['pmra']<100) & (df['phot_rp_mean_mag']<31)]
-        #df2=df[ (df['umag']>16)&(df['zmag']>16) ]
         
         #df2.index = range(len(df2))      
         ## limit the filed of view to 600*600 arcsec^2 square zone;