diff --git a/assets/sky_grid_1deg_9x9_2mass.csv b/assets/sky_grid_1deg_9x9_2mass.csv
new file mode 100644
index 0000000..65e367e
--- /dev/null
+++ b/assets/sky_grid_1deg_9x9_2mass.csv
@@ -0,0 +1,82 @@
+ra_deg,dec_deg,temperature_K,amplitude_sr
+-0.500000,0.500000,2500,1.288768695e-13
+-0.375000,0.500000,2500,5.130680588e-14
+-0.250000,0.500000,2500,2.042560732e-14
+-0.125000,0.500000,2500,8.131580736e-15
+0.000000,0.500000,2500,3.237240599e-15
+0.125000,0.500000,2500,1.288768695e-15
+0.250000,0.500000,2500,5.130680588e-16
+0.375000,0.500000,2500,2.042560732e-16
+0.500000,0.500000,2500,8.131580736e-17
+-0.500000,0.375000,3044.7082,5.529309491e-14
+-0.375000,0.375000,3044.7082,2.201257756e-14
+-0.250000,0.375000,3044.7082,8.763364971e-15
+-0.125000,0.375000,3044.7082,3.488758433e-15
+0.000000,0.375000,3044.7082,1.388899748e-15
+0.125000,0.375000,3044.7082,5.529309491e-16
+0.250000,0.375000,3044.7082,2.201257756e-16
+0.375000,0.375000,3044.7082,8.763364971e-17
+0.500000,0.375000,3044.7082,3.488758433e-17
+-0.500000,0.250000,3708.0992,2.727501648e-14
+-0.375000,0.250000,3708.0992,1.085837964e-14
+-0.250000,0.250000,3708.0992,4.322798794e-15
+-0.125000,0.250000,3708.0992,1.720937197e-15
+0.000000,0.250000,3708.0992,6.851174381e-16
+0.125000,0.250000,3708.0992,2.727501648e-16
+0.250000,0.250000,3708.0992,1.085837964e-16
+0.375000,0.250000,3708.0992,4.322798794e-17
+0.500000,0.250000,3708.0992,1.720937197e-17
+-0.500000,0.125000,4516.0321,1.501787774e-14
+-0.375000,0.125000,4516.0321,5.978724815e-15
+-0.250000,0.125000,4516.0321,2.380173219e-15
+-0.125000,0.125000,4516.0321,9.475640258e-16
+0.000000,0.125000,4516.0321,3.772320332e-16
+0.125000,0.125000,4516.0321,1.501787774e-16
+0.250000,0.125000,4516.0321,5.978724815e-17
+0.375000,0.125000,4516.0321,2.380173219e-17
+0.500000,0.125000,4516.0321,9.475640258e-18
+-0.500000,0.000000,5500,9.010857559e-15
+-0.375000,0.000000,5500,3.587287007e-15
+-0.250000,0.000000,5500,1.428124680e-15
+-0.125000,0.000000,5500,5.685466757e-16
+0.000000,0.000000,5500,2.263425084e-16
+0.125000,0.000000,5500,9.010857559e-17
+0.250000,0.000000,5500,3.587287007e-17
+0.375000,0.000000,5500,1.428124680e-17
+0.500000,0.000000,5500,5.685466757e-18
+-0.500000,-0.125000,7067.9722,5.170563867e-15
+-0.375000,-0.125000,7067.9722,2.058438551e-15
+-0.250000,-0.125000,7067.9722,8.194791473e-16
+-0.125000,-0.125000,7067.9722,3.262405247e-16
+0.000000,-0.125000,7067.9722,1.298786922e-16
+0.125000,-0.125000,7067.9722,5.170563867e-17
+0.250000,-0.125000,7067.9722,2.058438551e-17
+0.375000,-0.125000,7067.9722,8.194791473e-18
+0.500000,-0.125000,7067.9722,3.262405247e-18
+-0.500000,-0.250000,9082.9511,3.209818520e-15
+-0.375000,-0.250000,9082.9511,1.277851769e-15
+-0.250000,-0.250000,9082.9511,5.087219521e-16
+-0.125000,-0.250000,9082.9511,2.025258569e-16
+0.000000,-0.250000,9082.9511,8.062699587e-17
+0.125000,-0.250000,9082.9511,3.209818520e-17
+0.250000,-0.250000,9082.9511,1.277851769e-17
+0.375000,-0.250000,9082.9511,5.087219521e-18
+0.500000,-0.250000,9082.9511,2.025258569e-18
+-0.500000,-0.375000,11672.372,2.109932559e-15
+-0.375000,-0.375000,11672.372,8.399792812e-16
+-0.250000,-0.375000,11672.372,3.344017750e-16
+-0.125000,-0.375000,11672.372,1.331277445e-16
+0.000000,-0.375000,11672.372,5.299910967e-17
+0.125000,-0.375000,11672.372,2.109932559e-17
+0.250000,-0.375000,11672.372,8.399792812e-18
+0.375000,-0.375000,11672.372,3.344017750e-18
+0.500000,-0.375000,11672.372,1.331277445e-18
+-0.500000,-0.500000,15000,1.446233663e-15
+-0.375000,-0.500000,15000,5.757559917e-16
+-0.250000,-0.500000,15000,2.292125888e-16
+-0.125000,-0.500000,15000,9.125117517e-17
+0.000000,-0.500000,15000,3.632774716e-17
+0.125000,-0.500000,15000,1.446233663e-17
+0.250000,-0.500000,15000,5.757559917e-18
+0.375000,-0.500000,15000,2.292125888e-18
+0.500000,-0.500000,15000,9.125117517e-19