syntax update process only for panstarrs queries

Author: jaymedina

astroquery/mast/services.py

@@ -289,18 +289,25 @@ def service_request_async(self, service, params, page_size=None, page=None, use_
         else:
             headers['Content-Type'] = 'application/json'
 
-            # After parameter syntax is updated, revert back to dictionary
-            # so params can be passed as a JSON dictionary
-            params_dict = {}
-            catalogs_request.extend(self._build_catalogs_params(params))
-            for key, val in catalogs_request:
-                params_dict.setdefault(key, []).append(val)
-            catalogs_request = params_dict
-
-            # Removing single-element lists. Single values will live on their own (except for `sort_by`)
-            for key in catalogs_request.keys():
-                if (key != 'sort_by') & (len(catalogs_request[key]) == 1):
-                    catalogs_request[key] = catalogs_request[key][0]
+            # Parameter syntax needs to be updated only for PANSTARRS catalog queries
+            if service.lower() == 'panstarrs':
+                catalogs_request.extend(self._build_catalogs_params(params))
+
+                # After parameter syntax is updated, revert back to dictionary
+                # so params can be passed as a JSON dictionary
+                params_dict = {}
+                for key, val in catalogs_request:
+                    params_dict.setdefault(key, []).append(val)
+                catalogs_request = params_dict
+
+                # Removing single-element lists. Single values will live on their own (except for `sort_by`)
+                for key in catalogs_request.keys():
+                    if (key != 'sort_by') & (len(catalogs_request[key]) == 1):
+                        catalogs_request[key] = catalogs_request[key][0]
+
+            # Otherwise, catalogs_request can remain as the original params dict
+            else:
+                catalogs_request = params
 
         response = self._request('POST', request_url, data=catalogs_request, headers=headers, use_json=use_json)
         return response