#include <lal/LALConstants.h>
This header defines a number of useful numerical constants for use in LAL routines. These constants come in three basic flavours: arithmetic and mathematical constants, fundamental (or defined) physical constants, and measured astrophysical and cosmological parameters.
Note that, unlike the other headers in the std package, this
header is not included automatically by the header
LALStdlib.h. Include it explicitly if you need any of these
constants.