Abstract Details

Name: Avinash Kumar Paladi
Affiliation: Indian Institute of Science
Conference ID : ASI2024_24
Title : Multiband extension of Wideband Timing Technique
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
Authors Affiliation: 1 Joint Astronomy Programme, Indian Institute of Science, Bengaluru, Karnataka, 560012, India 2 Department of Earth and Space Sciences, Indian Institute of Space Science and Technology, Valiamala, Thiruvananthapuram 695547, Kerala, India 3 Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Colaba, Mumbai 400005, India 4 Department of Physics, BITS Pilani Hyderabad Campus, Hyderabad 500078, Telangana, India 5 Center for Gravitation Cosmology and Astrophysics, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA 6 National Centre for Radio Astrophysics, Pune University Campus, Pune 411007, India 7 Department of Physics, Indian Institute of Technology Roorkee, Roorkee-247667, India 8 The Institute of Mathematical Sciences, C. I. T. Campus, Taramani, Chennai 600113, India 9 Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India 10 Department of Electrical Engineering, IIT Hyderabad, Kandi, Telangana 502284, India 11 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany 12 Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany 13 Department of Physics and Astrophysics, University of Delhi, Delhi 14 Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, West Bengal, 741246, India 15 Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, West Bengal, 741246, India 16 Indian Institute of Science Education and Research, Mohali - 140306, Punjab, India 17 Department of Physics, IIT Hyderabad, Kandi, Telangana 502284, India 18 Kumamoto University, Graduate School of Science and Technology, Kumamoto, 860-8555, Japan 19 Department of Physics, St. Xavier’s College (Autonomous), Mumbai 400001, Maharashtra, India 20 Arecibo Observatory, University of Central Florida, Arecibo 00612, USA 21 Department of Physics, IISER Bhopal, Bhauri Bypass Road, Bhopal 462066, India 22 Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan 23 International Research Organization for Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
Mode of Presentation: 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.