Low-frequency wideband timing of InPTA pulsars observed with the uGMRT

Understand

High-precision measurements of the pulsar dispersion measure (DM) are possible using telescopes with low-frequency wideband receivers.

• We present an initial study of the application of the wideband timing technique, which can simultaneously measure the pulsar times of arrival (ToAs) and DMs, for a set of five pulsars observed with the upgraded Giant Metrewave Radio Telescope (uGMRT) as part of the Indian Pulsar Timing Array (InPTA) campaign.
• We have used the observations with the 300-500 MHz band of the uGMRT for this purpose.
• We obtain high precision in DM measurements with precisions of the order 10^{-6}cm^{-3}pc.