Add baseline foreground model. (#10)

Added baseline foreground model.

params/foregrounds.yaml

@@ -0,0 +1,131 @@
+# Foreground parameters for ACT DR6.
+a_tSZ:
+  prior:
+    min: 0.0
+    max: 10.0
+  ref:
+    dist: norm
+    loc: 5.6
+    scale: 1.0
+  proposal: 0.1
+  latex: a_\mathrm{tSZ}
+a_kSZ:
+  prior:
+    min: 0.0
+    max: 10.0
+  ref:
+    dist: norm
+    loc: 2.0
+    scale: 2.0
+  proposal: 0.1
+  latex: a_\mathrm{kSZ}
+a_p:
+  prior:
+    min: 0.0
+    max: 50.0
+  ref:
+    dist: norm
+    loc: 6.0
+    scale: 0.7
+  proposal: 0.3
+  latex: a_p
+beta_p:
+  prior:
+    min: 0.0
+    max: 5.0
+  ref:
+    dist: norm
+    loc: 2.0
+    scale: 0.05
+  proposal: 0.015
+  latex: \beta_p
+a_c:
+  prior:
+    min: 0.0
+    max: 50.0
+  ref:
+    dist: norm
+    loc: 3.0
+    scale: 1.0
+  proposal: 0.7
+  latex: a_c
+beta_c:
+  value: "lambda beta_p: beta_p"
+  latex: \beta_c
+a_s:
+  prior:
+    min: 0.0
+    max: 50.0
+  ref:
+    dist: norm
+    loc: 3.0
+    scale: 1.0
+  proposal: 0.3
+  latex: a_s
+beta_s:
+  prior:
+    min: -3.5
+    max: -1.5
+  proposal: 0.3
+  latex: \beta_s
+a_gtt:
+  prior:
+    min: 0.0
+    max: 50.0
+  ref:
+    dist: norm
+    loc: 8.0
+    scale: 0.6
+  proposal: 0.4
+  latex: a_\mathrm{dust}^\mathrm{TT}
+a_gte:
+  prior:
+    min: 0.0
+    max: 1.0
+  ref:
+    dist: norm
+    loc: 0.42
+    scale: 0.06
+  proposal: 0.03
+  latex: a_\mathrm{dust}^\mathrm{TE}
+a_gee:
+  prior:
+    min: 0.0
+    max: 1.0
+  ref:
+    dist: norm
+    loc: 0.17
+    scale: 0.03
+  proposal: 0.03
+  latex: a_\mathrm{dust}^\mathrm{EE}
+a_psee:
+  prior:
+    min: 0.0
+    max: 1.0
+  ref:
+    dist: halfnorm
+    loc: 0.0
+    scale: 0.04
+  proposal: 0.05
+  latex: a_\mathrm{ps}^\mathrm{EE}
+a_pste:
+  prior:
+    min: -1.0
+    max: 1.0
+  ref:
+    dist: norm
+    loc: 0.0
+    scale: 0.11
+  proposal: 0.05
+  latex: a_\mathrm{ps}^\mathrm{TE}
+xi:
+  prior:
+    min: 0.0
+    max: 0.2
+  proposal: 0.05
+  latex: \xi
+
+# Fixed values of nuisance
+T_d:
+  value: 9.60
+  latex: T_d