Merge branch 'tickets/DM-45529'

lsst · Oct 1, 2024 · 4eafb96 · 4eafb96
2 parents c4f9d4d + ce0daa1
commit 4eafb96
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/python/lsst/source/injection/inject_engine.py b/python/lsst/source/injection/inject_engine.py
@@ -290,6 +290,8 @@ def make_galsim_trail(
     linear_wcs = wcs.linearizePixelToSky(sky_coords, arcseconds)
     mat = linear_wcs.getMatrix()
     object = object.transform(mat[0, 0], mat[0, 1], mat[1, 0], mat[1, 1])
+    # Rescale flux; transformation preserves surface brightness, not flux.
+    object *= 1.0 / np.abs(mat[0, 0] * mat[1, 1] - mat[0, 1] * mat[1, 0])
     return object  # type: ignore