To find and download HEASARC data in the cloud, you can use astroquery.heasarc or download our new tool, hark.
The HEASARC and NuSTAR teams are greatly saddened by the sudden passing of Katja Pottschmidt. Most recently Katja was the lead scientist for the NuSTAR Guest Observer Facility (GOF), a role she had supported for many years. During her science career she worked on many other high energy astrophysics missions and played an integral role in advancing our knowledge of the universe. She was a wonderful colleague and friend and will be keenly missed by all who knew her.
vvoigt, zvvoigt: Voigt line profile with widths in km/s
A Voigt line profile with both and
in km/s. The
Voigt profile is the convolution of a Gaussian and a Lorentzian. It can be written as:
where
is the Faddeeva function, and
The parameters are:
par1 | |
par2 | |
par3 | |
Norm |
For zvoigt the parameters are:
par1 | |
par2 | |
par3 | |
par4 | |
Norm |
Both the gaussian and lorentzian lines are truncated at the point that
the integrated flux under the line is within a critical value of the
total flux. This critical value can be changed using xset
LINECRITLEVEL. The default critical value is
.
Note also that the normalization is defined as the integral over
energies greater than zero since negative energies are unphysical.