Losing information after spline subtraction

[lucabaldini]

In nsorrentino directory in sandbox (look at fix_spline_operations branch if that isn't in master) there is a code that show how we lose information about axes names and units after operating on different power law distributions

#!python

>>> Reading FITS image from /home/nunzio/ixpe/ixpeobssim/ixpeobssim/config/fits/crab_0p3_10p0_keV.fits...
Filename: /home/nunzio/ixpe/ixpeobssim/ixpeobssim/config/fits/crab_0p3_10p0_keV.fits
No.    Name      Ver    Type      Cards   Dimensions   Format
  0  PRIMARY       1 PrimaryHDU      26   (1024, 1024)   float32   
WARNING: VerifyWarning: Verification reported errors: [astropy.io.fits.verify]
WARNING: VerifyWarning: Card 'CDELT1' is not FITS standard (invalid value string: '-6.833333464e-05').  Fixed 'CDELT1' card to meet the FITS standard. [astropy.io.fits.verify]
WARNING: VerifyWarning: Note: astropy.io.fits uses zero-based indexing.
 [astropy.io.fits.verify]
WARNING: VerifyWarning: Verification reported errors: [astropy.io.fits.verify]
WARNING: VerifyWarning: Card 'CDELT2' is not FITS standard (invalid value string: '6.833333464e-05').  Fixed 'CDELT2' card to meet the FITS standard. [astropy.io.fits.verify]
Final spectrum x ax. xname = None xunits = None
Final spectrum y ax. yname = pdf yunits = None

Original url: https://bitbucket.org/ixpesw/ixpeobssim/issues/126
Created on 2018-07-10T14:44:01.828787+00:00