From 5f5b214f3d763da41131596c3e3b4892b00d2eb5 Mon Sep 17 00:00:00 2001
From: Eli Rykoff <erykoff@stanford.edu>
Date: Wed, 30 Aug 2023 09:29:50 -0700
Subject: [PATCH 1/4] Add colorterms for ATLAS Refcat2 -> LATISS (g/r/i).

---
 config/latiss/colorterms.py | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 config/latiss/colorterms.py

diff --git a/config/latiss/colorterms.py b/config/latiss/colorterms.py
new file mode 100644
index 000000000..4f60efd30
--- /dev/null
+++ b/config/latiss/colorterms.py
@@ -0,0 +1,37 @@
+from lsst.pipe.tasks.colorterms import Colorterm, ColortermDict
+
+
+config.data = {
+    "atlas_refcat2*": ColortermDict(data={
+        "SDSSg_65mm~empty": Colorterm(
+            primary="g",
+            secondary="r",
+            c0=-0.09034144345111599,
+            c1=0.1710923238086337,
+            c2=-0.038260355621929296,
+        ),
+        "SDSSr_65mm~empty": Colorterm(
+            primary="r",
+            secondary="i",
+            c0=0.0073632488906825045,
+            c1=-0.026620900037027242,
+            c2=-0.03203533692013322,
+        ),
+        "SDSSi_65mm~empty": Colorterm(
+            primary="i",
+            secondary="r",
+            c0=0.016940180565664747,
+            c1=0.0610018330811135,
+            c2=-0.0722575356707918,
+        ),
+        # The following two are blank until we have data to measure them.
+        "SDSSz_65mm~empty": Colorterm(
+            primary="z",
+            secondary="z",
+        ),
+        "SDSSy_65mm~empty": Colorterm(
+            primary="y",
+            secondary="y",
+        ),
+    }),
+}

From 39902c345de335a49ea2b554af40801b6a26f5cf Mon Sep 17 00:00:00 2001
From: Eli Rykoff <erykoff@stanford.edu>
Date: Wed, 30 Aug 2023 09:30:16 -0700
Subject: [PATCH 2/4] Add filterMap to properly map reference catalog to LATISS
 filters.

---
 config/latiss/filterMap.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 config/latiss/filterMap.py

diff --git a/config/latiss/filterMap.py b/config/latiss/filterMap.py
new file mode 100644
index 000000000..603e53bef
--- /dev/null
+++ b/config/latiss/filterMap.py
@@ -0,0 +1,12 @@
+# Mapping of camera filter name: reference catalog filter name
+# This file is appropriate for ATLAS Refcat2.
+
+for source, target in [
+        ("SDSSg_65mm~empty", "g"),
+        ("SDSSr_65mm~empty", "r"),
+        ("SDSSi_65mm~empty", "i"),
+        ("SDSSz_65mm~empty", "z"),
+        # ATLAS Refcat2 does not have y band.
+        ("SDSSy_65mm~empty", "z"),
+    ]:
+    config.filterMap[source] = target

From d0021e853df6ba303e4647c8fdbb7c5203de4a25 Mon Sep 17 00:00:00 2001
From: Eli Rykoff <erykoff@stanford.edu>
Date: Wed, 30 Aug 2023 09:31:22 -0700
Subject: [PATCH 3/4] Add color terms to calibrate config and limit color
 range.

---
 config/latiss/calibrate.py | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/config/latiss/calibrate.py b/config/latiss/calibrate.py
index c034cd25f..388c57787 100644
--- a/config/latiss/calibrate.py
+++ b/config/latiss/calibrate.py
@@ -1,8 +1,21 @@
+import os.path
+
 from lsst.meas.astrom import FitAffineWcsTask
+from lsst.meas.algorithms import ColorLimit
+
+ObsConfigDir = os.path.dirname(__file__)
 
 # Configure the photometry to use atlas_refcat2.
-config.connections.photoRefCat = 'atlas_refcat2_20220201'
+config.connections.photoRefCat = "atlas_refcat2_20220201"
+config.photoRefObjLoader.load(os.path.join(ObsConfigDir, "filterMap.py"))
+
 config.photoCal.match.referenceSelection.magLimit.fluxField = "r_flux"
+colors = config.photoCal.match.referenceSelection.colorLimits
+colors["g-r"] = ColorLimit(primary="g_flux", secondary="r_flux", minimum=0.4, maximum=2.0)
+
+config.photoCal.applyColorTerms = True
+config.photoCal.photoCatName="atlas_refcat2_20220201"
+config.photoCal.colorterms.load(os.path.join(ObsConfigDir, "colorterms.py"))
 
 # We often have very few sources due to smaller aperture so use affine task. 
 config.astrometry.wcsFitter.retarget(FitAffineWcsTask)

From d872757a939f2c98bba31f2a4594d66c1699a168 Mon Sep 17 00:00:00 2001
From: Eli Rykoff <erykoff@stanford.edu>
Date: Wed, 30 Aug 2023 09:31:51 -0700
Subject: [PATCH 4/4] Remove extra space.

---
 config/latiss/calibrate.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/latiss/calibrate.py b/config/latiss/calibrate.py
index 388c57787..e9bba3af7 100644
--- a/config/latiss/calibrate.py
+++ b/config/latiss/calibrate.py
@@ -17,7 +17,7 @@
 config.photoCal.photoCatName="atlas_refcat2_20220201"
 config.photoCal.colorterms.load(os.path.join(ObsConfigDir, "colorterms.py"))
 
-# We often have very few sources due to smaller aperture so use affine task. 
+# We often have very few sources due to smaller aperture so use affine task.
 config.astrometry.wcsFitter.retarget(FitAffineWcsTask)
 
 # Note that the following two config values were validated on data taken in