added des magnification balrog example

examples/ssi/config_des_mag.yml

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+# Values in this section are accessible to all the different stages.
+# They can be overridden by individual stages though.
+global:
+    # This is read by many stages that read complete
+    # catalog data, and tells them how many rows to read
+    # at once
+    chunk_rows: 10000
+    # These mapping options are also read by a range of stages
+    pixelization: healpix
+    nside: 256
+    sparse: true  # Generate sparse maps - faster if using small areas
+
+
+TXIngestSSIMatchedDESBalrogMag:
+    name: TXIngestSSIMatchedDESBalrogMag
+
+TXMeanLensSelectorSSI:
+    name: TXMeanLensSelectorSSI
+    # Mag cuts
+    lens_zbin_edges: [0.20, 0.40, 0.55, 0.70, 0.85, 0.95, 1.05]
+    selection_type: DESmaglim
+    maglim_band: i
+    bright_limit: 17.5
+    a: 4
+    b: 18
+    extra_cols: [EXTENDED_CLASS_SOF, FLAGS_GOLD]
+
+TXMeanLensSelectorSSIMag:
+    name: TXMeanLensSelectorSSIMag
+    # Mag cuts
+    lens_zbin_edges: [0.20, 0.40, 0.55, 0.70, 0.85, 0.95, 1.05]
+    selection_type: DESmaglim
+    maglim_band: i
+    bright_limit: 17.5
+    a: 4
+    b: 18
+    extra_cols: [EXTENDED_CLASS_SOF, FLAGS_GOLD]
+
+TXLensCatalogSplitterSSI:
+    name: TXLensCatalogSplitterSSI
+
+TXLensCatalogSplitterSSIMag:
+    name: TXLensCatalogSplitterSSIMag
+
+TXSSIMagnification:
+    name: TXSSIMagnification
+    applied_magnification: 1.02
+    n_patches: 500
+    bootstrap_error: true

examples/ssi/pipeline_des_mag.yml

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+# Stages to run
+stages:
+  - name: TXIngestSSIMatchedDESBalrog    # process the unmagnified SSI inputs
+  - name: TXIngestSSIMatchedDESBalrogMag    # process the magnified SSI inputs
+    classname: TXIngestSSIMatchedDESBalrog
+    aliases:
+        balrog_matched_catalog: balrog_matched_catalog_mag
+        matched_ssi_photometry_catalog: matched_ssi_photometry_catalog_mag
+
+  - name: TXMeanLensSelectorSSI        #make unmagnified SSI lens samples
+    classname: TXMeanLensSelector
+    aliases:
+        photometry_catalog: matched_ssi_photometry_catalog
+        lens_photoz_pdfs: balrog_lens_photoz_pdfs
+  - name: TXLensCatalogSplitterSSI
+    classname: TXLensCatalogSplitter
+    aliases:
+        photometry_catalog: matched_ssi_photometry_catalog
+        lens_photoz_pdfs: balrog_lens_photoz_pdfs
+
+  - name: TXMeanLensSelectorSSIMag     #make magnified SSI lens samples
+    classname: TXMeanLensSelector
+    aliases:
+        photometry_catalog: matched_ssi_photometry_catalog_mag
+        lens_tomography_catalog_unweighted: lens_tomography_catalog_unweighted_mag
+        lens_photoz_pdfs: balrog_lens_photoz_pdfs_mag
+  - name: TXLensCatalogSplitterSSIMag
+    classname: TXLensCatalogSplitter
+    aliases:
+        photometry_catalog: matched_ssi_photometry_catalog_mag
+        lens_tomography_catalog_unweighted: lens_tomography_catalog_unweighted_mag
+        binned_lens_catalog_unweighted: binned_lens_catalog_unweighted_mag
+        lens_photoz_pdfs: balrog_lens_photoz_pdfs_mag
+
+  - name: TXSSIMagnification    # compute magnification coefficients for lens sample
+    aliases:
+        binned_lens_catalog_nomag: binned_lens_catalog_unweighted
+        binned_lens_catalog_mag: binned_lens_catalog_unweighted_mag
+
+
+modules: txpipe
+
+# Where to put outputs
+output_dir: data/example/outputs_ssi_des_mag/
+
+# How to run the pipeline: mini, parsl, or cwl
+launcher:
+    name: mini
+    interval: 1.0
+
+# Where to run the pipeline: cori-interactive, cori-batch, or local
+site:
+    name: local
+    max_threads: 2
+
+# configuration settings
+config: examples/ssi/config_des_mag.yml
+
+inputs:
+    # See README for paths to download these files
+    balrog_matched_catalog:      /global/cfs/cdirs/lsst/groups/WL/users/jelvinpo/balrog_txpipe_example/balrog_matched_catalog_sof_run2a_v1.4.fits
+    balrog_matched_catalog_mag:  /global/cfs/cdirs/lsst/groups/WL/users/jelvinpo/balrog_txpipe_example/balrog_matched_catalog_sof_run2a-mag_v1.4.fits
+    balrog_lens_photoz_pdfs:     /global/cfs/cdirs/lsst/groups/WL/users/jelvinpo/balrog_txpipe_example/balrog_matched_catalog_sof_run2a_v1.4_dnf.h5
+    balrog_lens_photoz_pdfs_mag: /global/cfs/cdirs/lsst/groups/WL/users/jelvinpo/balrog_txpipe_example/balrog_matched_catalog_sof_run2a-mag_v1.4_dnf.h5
+
+    fiducial_cosmology: data/fiducial_cosmology.yml
+
+# if supported by the launcher, restart the pipeline where it left off
+# if interrupted
+resume: false
+# where to put output logs for individual stages
+log_dir: data/example/outputs_ssi_des_mag/logs/
+# where to put an overall parsl pipeline log
+pipeline_log: data/example/outputs_ssi_des_mag/log.txt