Merge pull request #1024 from lsst/tickets/DM-47730

DM-47730: Use new refcat loader method to improve refcat flux field checks.
lsst · Jan 21, 2025 · 6b5a48f · 6b5a48f
2 parents 8ffcb69 + bc9eaaf
commit 6b5a48f
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Showing 2 changed files with 10 additions and 6 deletions.
diff --git a/python/lsst/pipe/tasks/loadReferenceCatalog.py b/python/lsst/pipe/tasks/loadReferenceCatalog.py
@@ -38,8 +38,6 @@
 from lsst.afw.image import abMagErrFromFluxErr
 from lsst.meas.algorithms import ReferenceObjectLoader, LoadReferenceObjectsConfig
 
-import lsst.geom
-
 
 class LoadReferenceCatalogConfig(pexConfig.Config):
     """Config for LoadReferenceCatalogTask"""
@@ -340,9 +338,7 @@ def _determineFluxFields(self, center, filterList):
             if refFilterName is None:
                 continue
             try:
-                results = self.refObjLoader.loadSkyCircle(center,
-                                                          0.05*lsst.geom.degrees,
-                                                          refFilterName)
+                results = self.refObjLoader.loadSchema(refFilterName)
                 foundReferenceFilter = True
                 self._referenceFilter = refFilterName
                 break
@@ -377,7 +373,7 @@ def _determineFluxFields(self, center, filterList):
 
             if refFilterName is not None:
                 try:
-                    fluxField = getRefFluxField(results.refCat.schema, filterName=refFilterName)
+                    fluxField = getRefFluxField(results.schema, filterName=refFilterName)
                 except RuntimeError:
                     # This flux field isn't available.  Set to None
                     fluxField = None

diff --git a/tests/test_loadReferenceCatalog.py b/tests/test_loadReferenceCatalog.py
@@ -63,6 +63,14 @@ def loadSkyCircle(self, ctrCoord, radius, filterName, **kwargs):
     def loadPixelBox(self, bbox, wcs, referenceFilter, **kwargs):
         return self.loadSkyCircle(None, None, referenceFilter)
 
+    def loadSchema(self, filterName):
+        refCat = self.make_synthetic_refcat(_synthCenter, _synthFlux)
+        fluxField = getRefFluxField(schema=refCat.schema, filterName=filterName)
+        return pipeBase.Struct(
+            schema=refCat.schema,
+            fluxField=fluxField
+        )
+
 
 class LoadReferenceCatalogTestCase(lsst.utils.tests.TestCase):
     @classmethod