| Name: | Neel Kolhe |
| Affiliation: | Department of Physics, St. Xavier's College, Mumbai |
| Conference ID : | ASI2022_598 |
| Title : | Evidence for profile changes in PSR J1713+0747 using the uGMRT |
| Authors : | Neel Kolhe (On behalf of the Indian Pulsar Timing Array (InPTA) collaboration, based on the publication: https://academic.oup.com/mnrasl/article/507/1/L57/6356572) |
| Abstract Type: | Poster |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | PSR J1713+0747 is one of the most precisely timed pulsars in the international pulsar timing array experiment. This pulsar showed an abrupt profile shape change between 2021 April 16, (MJD 59320) and 2021 April 17 (MJD 59321). Profile mode changes are believed to arise from a re-organization of pulsar beams, probably due to global changes in the pulsar magnetosphere. In this endeavor, we report the results from multi-frequency observations of this pulsar carried out with the upgraded Giant Metrewave Radio Telescope (uGMRT) before and after the event. We demonstrate the profile change seen in Band 5 (1260 MHz–1460 MHz) and Band 3 (300 MHz–500 MHz). The timing analysis of this pulsar shows a disturbance accompanying this profile change followed by a recovery with a time-scale of ∼159 days. Our data suggest that a model with chromatic index as a free parameter is preferred over models with combinations of achromaticity with DM bump or scattering bump. |