  A double-peak spectral-energy-density of gamma-rays, similar to that observed
in blazars, is expected in gamma-ray bursts (GRBs) produced in supernova (SN)
explosions. The second peak, which is formed by inverse Compton scattering of
ambient SN light by cosmic ray electrons accelerated by the jets from the SN
explosion, has a much higher peak-energy than the first ordinary peak. However,
in X-ray flashes (XRFs), which in the cannonball (CB) model are normal GRBs
viewed farther off axis, the first peak-energy is shifted to the soft X-ray
region while the second peak-energy moves to the MeV range. In far-off-axis
GRBs, such as GRBs 980425 and 031203, the second peak may have been confused
with the normal GRB peak. In most GRBs, which have been observed so far, the
gamma-ray detectors ran out of statistics far below the second peak. However,
in bright GRBs, the two peaks may be resolved by simultaneous measurements with
SWIFT and GLAST.
