Multifrequency obs. of radio pulse broadening

Data were collected with the 305m Arecibo telescope at four radio frequencies between 430 and 2380MHz. We used a CLEAN-based algorithm to deconvolve interstellar pulse broadening from the measured pulse shapes.

We employed two distinct pulse-broadening functions (PBFs): PBF_1_ is appropriate for a thin screen of scattering material between the Earth and a pulsar, while PBF_2_ is appropriate for scattering material uniformly distributed along the line of sight from the Earth to a pulsar. We found that some observations were better fitted by PBF_1_ and some by PBF_2_. Pulse-broadening times ({tau}_d_) are derived from fits of PBFs to the data and are compared with the predictions of a smoothed model of the Galactic electron distribution.