Weak lensing: updated baseline shear estimator + manuscript figures

case_studies/weak_lensing/generate_dc2_lensing_catalog.py

@@ -7,6 +7,7 @@
 import numpy as np
 import pandas as pd
 from GCRCatalogs import GCRQuery
+from GCRCatalogs.helpers.tract_catalogs import tract_filter
 
 GCRCatalogs.set_root_dir("/data/scratch/dc2_nfs/")
 
@@ -43,7 +44,8 @@
         "mag_i",
         "mag_z",
         "mag_y",
-    ]
+    ],
+    native_filters=[tract_filter([3634, 3635, 3636, 3827, 3828, 3829, 3830, 4025, 4026, 4027])],
 )
 truth_df = pd.DataFrame(truth_df)
 
@@ -100,14 +102,16 @@
         "psf_fwhm_i",
         "psf_fwhm_z",
         "psf_fwhm_y",
-    ]
+    ],
+    filters=ra_dec_filters,
+    native_filters=[tract_filter([3634, 3635, 3636, 3827, 3828, 3829, 3830, 4025, 4026, 4027])],
 )
 object_truth_df = pd.DataFrame(object_truth_df)
 
 
 print("Loading CosmoDC2...\n")  # noqa: WPS421
 
-config_overwrite = {"catalog_root_dir": "/data/scratch/dc2_nfs/cosmoDC2"}
+config_overwrite = {"catalog_root_dir": "/data/scratch/dc2_nfs/cosmoDC2_v1.1.4"}
 
 cosmo_cat = GCRCatalogs.load_catalog("desc_cosmodc2", config_overwrite)
 
@@ -118,6 +122,8 @@
         "dec",
         "ellipticity_1_true",
         "ellipticity_2_true",
+        "ellipticity_1_true_dc2",
+        "ellipticity_2_true_dc2",
         "shear_1",
         "shear_2",
         "convergence",

case_studies/weak_lensing/generate_dc2_lensing_catalog_objectmatch.py

@@ -7,6 +7,7 @@
 import numpy as np
 import pandas as pd
 from GCRCatalogs import GCRQuery
+from GCRCatalogs.helpers.tract_catalogs import tract_filter
 
 GCRCatalogs.set_root_dir("/data/scratch/dc2_nfs/")
 
@@ -72,6 +73,7 @@
         "psf_fwhm_z",
         "psf_fwhm_y",
     ],
+    native_filters=[tract_filter([3634, 3635, 3636, 3827, 3828, 3829, 3830, 4025, 4026, 4027])],
 )
 object_truth_df = pd.DataFrame(object_truth_df)
 
@@ -96,7 +98,7 @@
 
 print("Loading CosmoDC2...\n")  # noqa: WPS421
 
-config_overwrite = {"catalog_root_dir": "/data/scratch/dc2_nfs/cosmoDC2"}
+config_overwrite = {"catalog_root_dir": "/data/scratch/dc2_nfs/cosmoDC2_v1.1.4"}
 cosmo_cat = GCRCatalogs.load_catalog("desc_cosmodc2", config_overwrite)
 
 cosmo_df = cosmo_cat.get_quantities(
@@ -106,6 +108,8 @@
         "dec",
         "ellipticity_1_true",
         "ellipticity_2_true",
+        "ellipticity_1_true_dc2",
+        "ellipticity_2_true_dc2",
         "shear_1",
         "shear_2",
         "convergence",

case_studies/weak_lensing/lensing_config_dc2.yaml

@@ -71,25 +71,25 @@ encoder:
 surveys:
     dc2:
         _target_: case_studies.weak_lensing.lensing_dc2.LensingDC2DataModule
-        dc2_image_dir: ${paths.dc2}/run2.2i-dr6-v4/coadd-t3828-t3829/deepCoadd-results/
+        dc2_image_dir: /data/scratch/dc2_nfs/run2.2i-dr6-v4/coadd-t3828-t3829/deepCoadd-results/
         dc2_cat_path: ${paths.dc2}/dc2_lensing_catalog.pkl
         image_slen: 4096
         n_image_split: 2  # split into n_image_split**2 subimages
         tile_slen: 256
         splits: 0:80/80:90/90:100
         avg_ellip_kernel_size: 15  # needs to be odd
-        avg_ellip_kernel_sigma: 4
+        avg_ellip_kernel_sigma: 5
         batch_size: 1
         num_workers: 1
-        cached_data_path: ${paths.dc2}/dc2_lensing_splits_radec
+        cached_data_path: ${paths.dc2}/dc2_lensing_splits
         train_transforms:
             - _target_: case_studies.weak_lensing.lensing_data_augmentation.LensingRotateFlipTransform
 
 train:
     trainer:
         logger:
             name: weak_lensing_experiments_dc2
-            version: october18
+            version: december4
         max_epochs: 250
         devices: 1
         use_distributed_sampler: false

case_studies/weak_lensing/lensing_dc2.py

@@ -3,6 +3,7 @@
 import sys
 from typing import List
 
+import numpy as np
 import pandas as pd
 import torch
 
@@ -102,10 +103,10 @@ def to_tile_catalog(self, full_catalog, height, width):
             v_count = torch.zeros(self.batch_size, num_tiles, v.shape[-1], dtype=v.dtype)
             add_pos = torch.ones_like(v)
 
-            if k == "psf":
-                psf_nanmask = ~torch.isnan(v).any(dim=-1, keepdim=True).expand(-1, -1, v.shape[-1])
-                v = torch.where(psf_nanmask, v, torch.tensor(0.0))
-                add_pos = psf_nanmask.float().to(v.dtype)
+            if k in {"psf", "ellip1_lsst", "ellip2_lsst"}:
+                nanmask = ~torch.isnan(v).any(dim=-1, keepdim=True).expand(-1, -1, v.shape[-1])
+                v = torch.where(nanmask, v, torch.tensor(0.0))
+                add_pos = nanmask.float().to(v.dtype)
                 source_to_tile_indices = source_to_tile_indices_default.expand(-1, -1, v.shape[-1])
             else:
                 source_to_tile_indices = source_to_tile_indices_default
@@ -167,6 +168,9 @@ def generate_cached_data(self, image_index):
         ellip1_lensed = tile_dict["ellip1_lensed_sum"] / tile_dict["ellip1_lensed_count"]
         ellip2_lensed = tile_dict["ellip2_lensed_sum"] / tile_dict["ellip2_lensed_count"]
         ellip_lensed = torch.stack((ellip1_lensed.squeeze(-1), ellip2_lensed.squeeze(-1)), dim=-1)
+        ellip1_lsst = tile_dict["ellip1_lsst_sum"] / tile_dict["ellip1_lsst_count"]
+        ellip2_lsst = tile_dict["ellip2_lsst_sum"] / tile_dict["ellip2_lsst_count"]
+        ellip_lsst = torch.stack((ellip1_lsst.squeeze(-1), ellip2_lsst.squeeze(-1)), dim=-1)
         redshift = tile_dict["redshift_sum"] / tile_dict["redshift_count"]
         ra = tile_dict["ra_sum"] / tile_dict["ra_count"]
         dec = tile_dict["dec_sum"] / tile_dict["dec_count"]
@@ -175,7 +179,8 @@ def generate_cached_data(self, image_index):
         tile_dict["shear_2"] = shear2
         tile_dict["convergence"] = convergence
         tile_dict["ellip_lensed"] = ellip_lensed
-        tile_dict["ellip_lensed_wavg"] = compute_weighted_avg_ellip(
+        tile_dict["ellip_lsst"] = ellip_lsst
+        tile_dict["ellip_lsst_wavg"] = compute_weighted_avg_ellip(
             tile_dict, self.avg_ellip_kernel_size, self.avg_ellip_kernel_sigma
         )
         tile_dict["redshift"] = redshift
@@ -211,15 +216,22 @@ def from_file(cls, cat_path, wcs, height, width, **kwargs):
         convergence = torch.from_numpy(catalog["convergence"].values)
         reduced_shear = complex_shear / (1.0 - convergence)
 
-        ellip1_intrinsic = torch.from_numpy(catalog["ellipticity_1_true"].values)
-        ellip2_intrinsic = torch.from_numpy(catalog["ellipticity_2_true"].values)
+        ellip1_intrinsic = torch.from_numpy(catalog["ellipticity_1_true_dc2"].values)
+        ellip2_intrinsic = torch.from_numpy(catalog["ellipticity_2_true_dc2"].values)
         complex_ellip_intrinsic = ellip1_intrinsic + ellip2_intrinsic * 1j
         complex_ellip_lensed = (complex_ellip_intrinsic + reduced_shear) / (
             1.0 + reduced_shear.conj() * complex_ellip_intrinsic
         )
         ellip1_lensed = torch.view_as_real(complex_ellip_lensed)[..., 0]
         ellip2_lensed = torch.view_as_real(complex_ellip_lensed)[..., 1]
 
+        ixx = torch.from_numpy(catalog["Iyy_pixel"].values)  # align coordinate system
+        iyy = torch.from_numpy(catalog["Ixx_pixel"].values)  # align coordinate system
+        ixy = torch.from_numpy(catalog["Ixy_pixel"].values)
+        ellip_lsst = (ixx - iyy + 2j * ixy) / (ixx + iyy + 2 * np.sqrt(ixx * iyy - (ixy**2)))
+        ellip1_lsst = torch.view_as_real(ellip_lsst)[..., 0]
+        ellip2_lsst = torch.view_as_real(ellip_lsst)[..., 1]
+
         redshift = torch.from_numpy(catalog["redshift"].values)
 
         _, psf_params = cls.get_bands_flux_and_psf(kwargs["bands"], catalog, median=False)
@@ -240,6 +252,8 @@ def from_file(cls, cat_path, wcs, height, width, **kwargs):
         convergence = convergence[plocs_mask]
         ellip1_lensed = ellip1_lensed[plocs_mask]
         ellip2_lensed = ellip2_lensed[plocs_mask]
+        ellip1_lsst = ellip1_lsst[plocs_mask]
+        ellip2_lsst = ellip2_lsst[plocs_mask]
 
         redshift = redshift[plocs_mask]
 
@@ -257,6 +271,8 @@ def from_file(cls, cat_path, wcs, height, width, **kwargs):
             "convergence": convergence.reshape(1, nobj, 1),
             "ellip1_lensed": ellip1_lensed.reshape(1, nobj, 1),
             "ellip2_lensed": ellip2_lensed.reshape(1, nobj, 1),
+            "ellip1_lsst": ellip1_lsst.reshape(1, nobj, 1),
+            "ellip2_lsst": ellip2_lsst.reshape(1, nobj, 1),
             "redshift": redshift.reshape(1, nobj, 1),
             "psf": psf_params.reshape(1, nobj, -1),
         }

case_studies/weak_lensing/lensing_metrics.py

@@ -29,12 +29,8 @@ def update(self, true_cat, est_cat, matching) -> None:
         pred_shear2 = est_cat["shear_2"].flatten(1, 2)
         zero_baseline_pred_shear1 = torch.zeros_like(true_shear1)
         zero_baseline_pred_shear2 = torch.zeros_like(true_shear2)
-        ellip_baseline_pred_shear1 = (
-            true_cat["ellip_lensed_wavg"][..., 0].unsqueeze(-1).flatten(1, 2)
-        )
-        ellip_baseline_pred_shear2 = (
-            true_cat["ellip_lensed_wavg"][..., 1].unsqueeze(-1).flatten(1, 2)
-        )
+        ellip_baseline_pred_shear1 = true_cat["ellip_lsst_wavg"][..., 0].unsqueeze(-1).flatten(1, 2)
+        ellip_baseline_pred_shear2 = true_cat["ellip_lsst_wavg"][..., 1].unsqueeze(-1).flatten(1, 2)
 
         if "convergence" not in est_cat:
             true_convergence = torch.zeros_like(true_shear1).flatten(1, 2)