Merge pull request !5 from WeidenthalerMatthias/feature.open_arguments

csst_fs/fits/fsspec_fits.py

-import fsspec
 from astropy.io import fits
 from ..fsspec_fileobj import open_fileobj
 from ..s3_config import load_s3_options
 
-def open(filename, s3_options=load_s3_options()):
-    return fits.open(filename, fsspec_kwargs=s3_options)
+def open(filename, s3_options=load_s3_options(), *args, **kwargs):
+    return fits.open(filename, fsspec_kwargs=s3_options, *args, **kwargs)
 
 def getdata(filename, s3_options=load_s3_options(), *args, **kwargs):
     fileobj = open_fileobj(filename, s3_options, mode='rb')