Most of these pulsars are localized within the LISM and have high values, confirming the existence of local enhanced scattering. The overall picture shows clearly that the LISM is highly turbulent compared to the outer regions. Bhat et al. 7 of Bhat et al. This sample includes 32 objects from Johnston et al.
Error bars are inversely proportional to the number of pulsar products averaged.
The estimators Bhat et al. This is not caused by refractive scintillation because the dynamic spectra show no frequency drift. Further and more sensitive observations are required to put any strong constraint on the proposed model for the LISM by Bhat et al. As already mentioned, in spite of an average high flux density measured during the first observation, because of its short duration compared to , the estimate is affected by a relatively large error. This suggests giving similar weights to the three observations in the calculation of .