Allow artificial scaling of source pixel images

paltas/Sources/galaxy_catalog.py

@@ -22,6 +22,7 @@ class GalaxyCatalog(SourceBase):
 	"""
 	required_parameters = ('random_rotation','output_ab_zeropoint',
 		'z_source','center_x','center_y')
+	optional_parameters = ('pixel_width_multiplier',)
 	# This parameter must be set by class inheriting GalaxyCatalog
 	ab_zeropoint = None
 
@@ -162,6 +163,9 @@ def draw_source(self, catalog_i=None, phi=None):
 
 		pixel_width *= self.z_scale_factor(metadata['z'], z_new)
 
+		# Option to artificially make sources bigger or smaller
+		pixel_width *= self.source_parameters.get('pixel_width_multiplier', 1)
+
 		# Convert to kwargs for lenstronomy
 		return (
 			['INTERPOL'],