add default value (5e-5) of chip.badfraction

observation_sim/instruments/chip/Chip.py

@@ -123,6 +123,7 @@ class Chip(FocalPlane):
         self.dark_noise = 0.02  # e/pix/s
         self.rotate_angle = 0.
         self.overscan = 1000
+        self.badfraction = 5e-5
         # Override default values
         # for key in ["gain", "bias_level, dark_exptime", "flat_exptime", "readout_time", "full_well", "read_noise", "dark_noise", "overscan"]:
         #     if key in config["ins_effects"]: