Abstract Details
| Name: Avinash Kumar Paladi Affiliation: Indian Institute of Science Conference ID: ASI2024_24 Title : Multiband extension of Wideband Timing Technique Authors and Co-Authors : Avinash Kumar Paladi1,2, Churchil Dwivedi2 , Prerna Rana3 , Nobleson K.4 , Abhimanyu Susobhanan5 , Bhal Chandra Joshi6,7 , Pratik Tarafdar8 , Debabrata Deb8 , Swetha Arumugam10, A. Gopakumar3 , M. A. Krishnakumar11,12, Neelam Dhanda Batra13, Jyotijwal Debnath8,9 , Fazal Kareem14,15 , Paramasivan Arumugam7 , Manjari Bagchi8,9 , Adarsh Bathula16, Subhajit Dandapat3 , Shantanu Desai17 , Yashwant Gupta6 , Shinnosuke Hisano18, Divyansh Kharbanda17, Tomonosuke Kikunaga18, Neel Kolhe19 , Yogesh Maan6 , P. K. Manoharan20, Jaikhomba Singha7 , Aman Srivastava17, Mayuresh Surnis21 , Keitaro Takahashi22,23 Abstract Type : Oral Abstract Category : Facilities, Technologies and Data science Abstract : The wideband timing technique enables the high-precision simultaneous estimation of Times of Arrival (ToAs) and Dispersion Measures (DMs) while effectively modeling frequency-dependent profile evolution. We present two novel independent methods that extend the standard wideband technique to handle simultaneous multi-band pulsar data incorporating profile evolution over a larger frequency span to estimate DMs and ToAs with enhanced precision. We implement the wideband likelihood using the libstempo python interface to perform wideband timing in the tempo2 framework. We present the application of these techniques to the dataset of fourteen millisecond pulsars observed simultaneously in Band 3 (300 − 500 MHz) and Band 5 (1260 − 1460 MHz) of the upgraded Giant Metrewave Radio Telescope (uGMRT) as a part of the Indian Pulsar Timing Array (InPTA) campaign. We achieve increased ToA and DM precision and sub-microsecond root mean square post-fit timing residuals by combining simultaneous multi-band pulsar observations done in non-contiguous bands for the first time using our novel techniques. |