Skip to main content

The HEASARC servers are experiencing intermittent overload issues.

If you are trying to download a lot of data, please consider using the cloud. We now have a new tool that allows you to find and download data from the cloud.

Alternatively, both software and data are available on the SciServer online platform.


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