## Model to aid estimating photon fluxes and errors
This convolution model can be used with any other combination of
models in order to estimate the photon flux and errors. The first two
parameters are the minimum and maximum energy (in keV) over which the
flux is calculated. These parameters must be frozen. The third
parameter is the photon flux in photons/cm^2/s. It is 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 photon flux is calculated.
To use this model place the cpflux component immediately in front of
the component(s) for which you want to estimate the photon flux and fix the
normalization parameter of then with the normalizaton of the power-law model fixed gives the photon flux and error on the entire model.
again with the normalization of the power-law fixed gives the unabsorbed photon flux and error. Finally,
with the normalizaton of the gaussian fixed gives the photon flux and error on the gaussian component. The source code file required is cpflux.cxx with the parameter information in cpflux_lmodel.dat. Keith Arnaud, Lab. for High Energy Astrophysics, NASA/Goddard Space Flight Center HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Thursday, 08-May-2014 12:03:53 EDT |