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-rw-r--r--updatewcs/det2im.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/updatewcs/det2im.py b/updatewcs/det2im.py
index 9009317..0aa8f2a 100644
--- a/updatewcs/det2im.py
+++ b/updatewcs/det2im.py
@@ -11,7 +11,8 @@ class DET2IMCorr(object):
`fobj`: pyfits object
Science file, for which a detector to image correction
is available
-
+ Uses a kw 'D2IMFILE' in the primary header to create an extension with
+ a detector to image correction.
"""
assert isinstance(fobj, pyfits.NP_pyfits.HDUList)