# 7.7. Add flux extensions: $$\tt -f$$¶

Appends an extension containing

• a $$\gamma$$-ray map with the flux per pixel,
• a $$\gamma$$-ray intensity map,
• a map with the neutrino flux per pixel,
• a neutrino intensity map,

to an existing FITS file inputoutputfile.fits containing a J-factor map:

$clumpy -f -D$ clumpy -f -i clumpy_params_f.txt -r inputoutputfile.fits

Note

• The parameters required in clumpy_params_f.txt (or to be given via the command line) depend on the content of inputoutputfile.fits (e.g., whether it is a D-factor map from decay or a J-factor map from annihilation, or whether it is an extragalactic halo at $$z>0$$ for which a $$\gamma$$-ray EBL absorption model has to be given). After loading inputoutputfile.fits, CLUMPY tells to the user which information it is missing.

• CLUMPY does not provide a mechanism to again delete FITS extensions once added. You can however easily use fv (fits viewer) to again remove extensions added with the -f option.