added api endpoint

urls.py

@@ -1 +1,10 @@
+from django.urls import path
+from .views import ConeSearchView
 
+urlpatterns = [
+    path(
+        'cone_search/<float:ra>/<float:dec>/<float:radius>',
+        ConeSearchView.as_view(),
+        name = 'cone_search'
+    ),
+]

views.py

@@ -19,6 +19,7 @@ class ConeSearchView(APIView):
         dec = float(dec)
         nside = 2048
 
+        #create skycoord for the center of search
         center = SkyCoord(ra=ra*u.deg, dec=dec*u.deg, frame='icrs')
 
         #fetch healpix indices in the specified disc
@@ -26,7 +27,7 @@ class ConeSearchView(APIView):
         #fetch all objects from those healpixes
         objects = GaiaSource.objects.filter(healpix_ring_index__in=healpix_indices)
 
-        results = []
+        results = [] #initialize the results list
 
         for obj in objects:
             
@@ -38,7 +39,7 @@ class ConeSearchView(APIView):
             
             separation = center.separation(source_coordinates)
 
-            if separation <= radius:
+            if separation.degrees <= radius:
 
                 results.append(obj)           
 
@@ -47,10 +48,13 @@ class ConeSearchView(APIView):
         return Response(serializer.data, status=status.HTTP_200_OK)
 
     def get_healpix_indices(ra, dec, radius, nside):
+
         # Convert the input coordinates to a SkyCoord object
         center = SkyCoord(ra=ra*u.deg, dec=dec*u.deg, frame='icrs')
+
         # Convert the center coordinates to HEALPix vector
-        vec = hp.ang2vec(center.ra.deg, center.dec.deg, lonlat=True)        
+        vec = hp.ang2vec(center.ra.deg, center.dec.deg, lonlat=True) 
+
         # Find the pixels within the given radius
         indices = hp.query_disc(nside, vec, np.radians(radius))        
         return indices