diff --git a/_downloads/astropy_UVES.tar.gz b/_downloads/astropy_UVES.tar.gz
index a7c38b2..16f096f 100644
Binary files a/_downloads/astropy_UVES.tar.gz and b/_downloads/astropy_UVES.tar.gz differ
diff --git a/_downloads/update_header.py b/_downloads/update_header.py
new file mode 100755
index 0000000..dcb4a64
--- /dev/null
+++ b/_downloads/update_header.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+from astropy.io import fits
+import glob
+
+filelist = glob.glob('UVES/*')
+
+for f in filelist:
+    hdu = fits.open(f, mode='update')
+    hdu[0].header.rename_keyword('RADECSYS', 'RADESYS')
+    print(hdu[0].header['RADESYS'])
+    hdu.flush()
+    hdu.close()