diff --git a/fink_broker/science.py b/fink_broker/science.py
index b0a846d2..07d52a49 100644
--- a/fink_broker/science.py
+++ b/fink_broker/science.py
@@ -56,6 +56,8 @@
     from fink_science.cats.processor import predict_nn
     from fink_science.agn.processor import agn_elasticc
     from fink_science.slsn.processor import slsn_elasticc
+    from fink_science.fast_transient_rate.processor import magnitude_rate
+    from fink_science.fast_transient_rate import rate_module_output_schema
     # from fink_science.t2.processor import t2
 except ImportError:
     _LOG.warning("Fink science modules are not available. ")
@@ -208,7 +210,8 @@ def apply_science_modules(df: DataFrame, noscience: bool = False) -> DataFrame:
     # Retrieve time-series information
     to_expand = [
         'jd', 'fid', 'magpsf', 'sigmapsf',
-        'magnr', 'sigmagnr', 'isdiffpos', 'distnr'
+        'magnr', 'sigmagnr', 'isdiffpos', 'distnr',
+        'diffmaglim'
     ]
 
     # Append temp columns with historical + current measurements
@@ -373,6 +376,19 @@ def apply_science_modules(df: DataFrame, noscience: bool = False) -> DataFrame:
         .withColumn("lc_features_r", df['lc_features'].getItem("2"))\
         .drop('lc_features')
 
+    # Apply level one processor: fast transient
+    _LOG.info("New processor: magnitude rate for fast transient")
+    mag_rate_args = [
+        "candidate.magpsf", "candidate.sigmapsf", "candidate.jd",
+        "candidate.jdstarthist", "candidate.fid", "cmagpsf", "csigmapsf",
+        "cjd", "cfid", "cdiffmaglim", F.lit(10000), F.lit(None)
+    ]
+    cols_before = df.columns
+    df = df.withColumn("ft_module", magnitude_rate(*mag_rate_args))
+    df = df.select(
+        cols_before + [df["ft_module"][k].alias(k) for k in rate_module_output_schema.keys()]
+    )
+
     # Drop temp columns
     df = df.drop(*expanded)