We report on observations of giant pulses from the Crab pulsar performed simultaneously with the Parkes radio telescope and the incoherent combination of the Murchison Widefield Array ( MWA ) antenna tiles .
The observations were performed over a duration of approximately one hour at a center frequency of 1382 MHz with 340 MHz bandwidth at Parkes , and at a center frequency of 193 MHz with 15 MHz bandwidth at the MWA .
Our analysis has led to the detection of 55 giant pulses at the MWA and 2075 at Parkes above a threshold of 3.5 \sigma and 6.5 \sigma respectively .
We detected 51 \% of the MWA giant pulses at the Parkes radio telescope , with spectral indices in the range of -3.6 > \alpha > -4.9 ( S _ { \nu } \propto \nu ^ { \alpha } ) .
We present a Monte Carlo analysis supporting the conjecture that the giant pulse emission in the Crab is intrinsically broadband , the less than 100 \% correlation being due to the relative sensitivities of the two instruments and the width of the spectral index distribution .
Our observations are consistent with the hypothesis that the spectral index of giant pulses is drawn from normal distribution of standard deviation 0.6 , but with a mean that displays an evolution with frequency from -3.00 at 1382 MHz , to -2.85 at 192 MHz .