Add Lilow2024 velocity fields (#133)

* Add Lilow data

* Fix Lilow NaNs

* Update nb

* Update nb

csiborgtools/flow/flow_model.py

@@ -103,12 +103,11 @@ class DataLoader:
         nobject = self._los_density.shape[1]
         dtype = self._los_density.dtype
 
-        # In case of Carrick 2015 the box is in galactic coordinates..
-        if simname == "Carrick2015":
-            # Carrick+2015 box is in galactic coordinates
+        if simname in ["Carrick2015", "Lilow2024"]:
+            # Carrick+2015 and Lilow+2024 are in galactic coordinates
             d1, d2 = radec_to_galactic(self._cat["RA"], self._cat["DEC"])
         elif "CF4" in simname:
-            # CF4 box is in supergalactic coordinates
+            # CF4 is in supergalactic coordinates
             d1, d2 = radec_to_supergalactic(self._cat["RA"], self._cat["DEC"])
         else:
             d1, d2 = self._cat["RA"], self._cat["DEC"]
@@ -142,6 +141,12 @@ class DataLoader:
         if simname in ["CF4", "CF4gp"]:
             self._los_density = np.clip(self._los_density, 1e-5, None,)
 
+        # Lilow+2024 outside of the range data is NaN. Replace it with some
+        # finite values. This is OK because the PV tracers are not so far.
+        if simname == "Lilow2024":
+            self._los_density[np.isnan(self._los_density)] = 1.
+            self._los_radial_velocity[np.isnan(self._los_radial_velocity)] = 0.
+
         self._mask = np.ones(len(self._cat), dtype=bool)
         self._catname = catalogue
 

csiborgtools/params.py

@@ -79,6 +79,7 @@ def simname2boxsize(simname):
          "Carrick2015": 400.,
          "CF4": 1000.,  # These need to be checked with Helene Courtois.
          "CF4gp": 1000.,
+         "Lilow2024": 400.,
          }
     boxsize = d.get(simname, None)
 
@@ -101,6 +102,7 @@ def simname2Omega_m(simname):
          "Carrick2015": 0.3,
          "CF4": 0.3,
          "CF4gp": 0.3,
+         "Lilow2024": 0.3175,
          }
 
     omega_m = d.get(simname, None)

csiborgtools/read/paths.py

@@ -117,6 +117,8 @@ class Paths:
             return [0]
         elif simname in ["CF4", "CF4gp"]:
             return [0]
+        elif simname == "Lilow2024":
+            return [0]
         else:
             raise ValueError(f"Unknown simulation name `{simname}`.")