fix _guess_host in windows

Author: zoghbi-a

astroquery/heasarc/core.py

@@ -771,7 +771,11 @@ def _guess_host(self, host):
                 'host has to be one of heasarc, sciserver, aws or None')
 
         # host is None, so we guess
-        if os.environ['HOME'] == '/home/idies' and os.path.exists('/FTP/'):
+        if (
+            'HOME' in os.environ
+            and os.environ['HOME'] == '/home/idies'
+            and os.path.exists('/FTP/')
+        ):
             # we are on idies, so we can use sciserver
             return 'sciserver'
 

docs/heasarc/heasarc.rst

@@ -198,9 +198,9 @@ catalog for all observations with exposure time greater than 190 ks.
         name      obsid     ra       dec    exposure
                             deg       deg       s    
     --------------- ----- --------- --------- --------
-            Sgr A* 13842 266.41667 -29.00781   191760
+       GW Transient 29852        --        --   300000
+             Sgr A* 13842 266.41667 -29.00781   191760
     IGR J17480-2446 30481 267.02013 -24.78024   200000
-    IGR J17480-2446 31425 267.02013 -24.78024   200000
 
 Another example may be to search the ``xmmmaster`` for a observation in some time range: