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Fig. 3


Sensitivity curves for the HBAs (left panel) and LBAs (right panel) to single pulses as a function of pulse width at a central frequency of 150 MHz (HBAs) and 50 MHz (LBAs) and assuming a bandwidth of 48 MHz. Single pulse widths for 787 pulsars were calculated by assuming them to be one third of the width of the average pulse and then scatter broadened assuming the relationship of Bhat et al. (2004). It was assumed that broadening of the pulse due to uncorrected dispersive smearing was negligible. Single pulse fluxes were determined based on the assumed pulse width and, if known, 100 MHz fluxes from Malofeev et al. (2000) were used. Otherwise, fluxes were extrapolated to 150 MHz from either 400 MHz or 1400 MHz measurements (whichever was available, Manchester et al. 2005) using a known spectral index or a typical spectral index of  − 1.8. The symbols are the same as in Fig. 2. The lines in all cases correspond to the sensitivity of a single international station (fine dashed line), the incoherent sum of 20 core stations (heavy dashed line), incoherent sum of all the LOFAR stations (filled line) and the coherent sum of 20 core stations (bold line).

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