ASCL.net

Astrophysics Source Code Library

Making codes discoverable since 1999

ASCL Code Record

[ascl:2108.006] viper: Velocity and IP EstimatoR

viper (Velocity and IP EstimatoR) measures differential radial velocities from stellar spectra taken through iodine or other gas cells. It convolves the product of a stellar template and a gas cell spectrum with an instrumental profile. Via least square fitting, it optimizes the parameters of the instrumental profile, the wavelength solution, flux normalization, and the stellar Doppler shift. viper offers various functions to describe the instrumental profile such as Gaussian, super-Gaussian, skewed Gaussian or mixtures of Gaussians. The code is developed for echelle spectra; it can handle data from CES, CRIRES+, KECK, OES, TCES, and UVES, and additional instruments can easily be added. A graphical interface facilitates the work with numerous flexible options.

Code site:
https://github.com/mzechmeister/viper
Used in:
https://ui.adsabs.harvard.edu/abs/2021arXiv210608660K
Bibcode:
2021ascl.soft08006Z

Views: 358

ascl:2108.006
Add this shield to your page
Copy the above HTML to add this shield to your code's website.