HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

Search:

[Advanced Search]



next up previous contents Xspec Home Page
Next: ireflect: reflection from ionized Up: Convolution Model Components Previous: cpflux: calculate photon flux


gsmooth: gaussian smoothing

Gaussian smoothing with a variable width $\Sigma(E)$, which varies as the par2 power of the energy. The width at 6 keV is set with par1. Note that the energy binning must be uniform. If the response energies are not uniformly spaced then the energies command should be used to set uniform energy binning.

$\displaystyle dC(E) = \frac{1}{\sqrt{2\pi\Sigma(E)^2}}\exp\left[-\frac{1}{2}\left(\frac{E-X}{\Sigma(E)}\right)^2\right]A(X)dX $

$\displaystyle \Sigma(E) = \sigma(E/6)^\alpha $

where:

par1=$\sigma$ gaussian sigma at 6 keV
par2=$\alpha$ power of energy for sigma variation

HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public
Last modified: Friday, 23-Aug-2024 13:20:40 EDT

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.