nirspec changes

Author: natashabatalha

pandexo/engine/reference/nirspec_input.json

@@ -5,10 +5,19 @@
             "target": true,
             "position": {
                 "ang_unit": "arcsec",
-                "xoff": 0.0,
-                "yoff": 0.0
+                "x_offset": 0.0,
+                "y_offset": 0.0
             },
+            "shape": {
+                    "geometry": "point"
+                },
             "spectrum": {
+                "extinction": {
+                    "bandpass": "j",
+                    "law": "mw_rv_31",
+                    "unit": "mag",
+                    "value": 0.0
+                },
                 "normalization": {
                      "type": "none"},
                 "sed": {