  Scattering of intense laser pulses on high-energy electron beams allows one
to produce a large number of X and gamma rays. For temporally pulsed lasers the
resulting spectra is broadband which severely limits practical applications.
One could use linearly chirped laser pulses to compensate that broadening. We
show for laser pulses chirped in the spectral domain that there is the optimal
chirp parameter at which the spectra has the brightest peak. Additionally, we
use catastrophe theory to analytically find this optimal chirp value.
