The Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center (GSFC) seeks a creative, innovative individual with strong teamwork and leadership skills to serve as Director of the High Energy Astrophysics Science Archive Research Center (HEASARC). This will be a permanent civil servant position. + Learn more.
cflux: calculate flux
A convolution model to calculate the
flux of other model components. For example:
cflux*phabs*(pow + gauss)
with the normalization of the powerlaw model fixed to a nonzero value
gives the flux and error on the entire model.
phabs*cflux*(pow + gauss)
again with the normalization of the powerlaw fixed to a nonzero value
gives the unabsorbed flux and error. Finally,
phabs*(pow + cflux*gauss)
with the normalizaton of the gaussian fixed to a nonzero value gives the
flux and error on the gaussian component. Note that when the cflux model is
used the normalization of one of the additive models must be fixed
to a nonzero value. It is also important to ensure that the energy range
over which the model is calculated (which is determined by the response
matrix in use) covers the energy range for which the flux is calculated.
If the model to which the cflux is applied integrates to zero then
a dividebyzero error will occur resulting in NaN values for the fit statistic.
Parameters are:
par1=Emin 
Minimum energy over which flux is calculated. 
par2=Emax 
Maximum energy over which flux is calculated. 
par3=lg10Flux 
log (base 10) flux in erg/cm/s 
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Last modified: Friday, 23Aug2024 13:20:40 EDT
The Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center (GSFC) seeks a creative, innovative individual with strong teamwork and leadership skills to serve as Director of the High Energy Astrophysics Science Archive Research Center (HEASARC). This will be a permanent civil servant position. + Learn more.
