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Published online by Cambridge University Press: 07 February 2017
Measurements of PSR 0833 − 45 were made at wavelengths of 21, 48, 73 and 100 cm. Pulse broadening proportional to about the fourth power of the wavelength was found, consistent with multipath scattering in the interstellar medium. It is further concluded that the rotation measure was constant at 33.2 rad m−2 across this wavelength range, supporting the conclusion that the radiation originates in the vicinity of a magnetic pole.