Cut down direct catalog to coarse pixel region.

lsst-dm · Jun 4, 2024 · bb2f029 · bb2f029
1 parent 41c7896
commit bb2f029
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/python/lsst/the/monster/measure_uband_offsetmaps.py b/python/lsst/the/monster/measure_uband_offsetmaps.py
@@ -277,6 +277,15 @@ def measure_uband_offset_map_direct(self, overwrite=False):
             if len(gaia_stars_all) == 0:
                 continue
 
+            # Cut down to those that are in the coarse pixel.
+            use, = np.where(hpg.angle_to_pixel(
+                self.nside_coarse,
+                gaia_stars_all["coord_ra"],
+                gaia_stars_all["coord_dec"]) == pixel)
+            if use.size == 0:
+                continue
+            gaia_stars_all = gaia_stars_all[use]
+
             # Read in the comparison catalog.
             uband_stars = read_stars(cat_info.path, htm_pixel_list, allow_missing=True)