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-rwxr-xr-xastro/fits/fitsimage.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/astro/fits/fitsimage.py b/astro/fits/fitsimage.py
index c83f02f..6238f60 100755
--- a/astro/fits/fitsimage.py
+++ b/astro/fits/fitsimage.py
@@ -103,8 +103,11 @@ class FITSImage:
self._pixelsize = value
# Update header
self.header["PixSize"] = value # [arcsec]
- self.header["CDELT1"] *= value / oldvalue
- self.header["CDELT2"] *= value / oldvalue
+ try:
+ self.header["CDELT1"] *= value / oldvalue
+ self.header["CDELT2"] *= value / oldvalue
+ except KeyError:
+ pass
@property
def fov(self):