Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Gupta, Yashwant"'
Autor:
Kikunaga, Tomonosuke, Hisano, Shinnosuke, Batra, Neelam Dhanda, Desai, Shantanu, Joshi, Bhal Chandra, Bagchi, Manjari, Prabu, T., Takahashi, Keitaro, Arumugam, Swetha, Bathula, Adarsh, Dandapat, Subhajit, Deb, Debabrata, Dwivedi, Churchil, Gupta, Yashwant, Jacob, Shebin Jose, Kareem, Fazal, K, Nobleson, Mamidipaka, Pragna, Paladi, Avinash Kumar, B, Arul Pandian, Rana, Prerna, Singha, Jaikhomba, Srivastava, Aman, Surnis, Mayuresh, Tarafdar, Pratik
High-precision pulsar timing observations are limited in their accuracy by the jitter noise that appears in the arrival time of pulses. Therefore, it is important to systematically characterise the amplitude of the jitter noise and its variation with
Externí odkaz:
http://arxiv.org/abs/2312.01875
We present the results of a high-time resolution polarization study of single pulses from pulsars B0950+08 and B1642-03. Single pulses from pulsar B0950+08 sometimes show isolated micropulses without any significant associated subpulse emission. Assu
Externí odkaz:
http://arxiv.org/abs/2310.18683
Autor:
Singha, Jaikhomba, Joshi, Bhal Chandra, Krishnakumar, M. A., Kareem, Fazal, Bathula, Adarsh, Dwivedi, Churchil, Jacob, Shebin Jose, Desai, Shantanu, Tarafdar, Pratik, Arumugam, P., Arumugam, Swetha, Bagchi, Manjari, Batra, Neelam Dhanda, Dandapat, Subhajit, Deb, Debabrata, Debnath, Jyotijwal, Gopakumar, A, Gupta, Yashwant, Hisano, Shinnosuke, Kato, Ryo, Kikunaga, Tomonosuke, Marmat, Piyush, Nobleson, K., Paladi, Avinash K., B., Arul Pandian, Prabu, Thiagaraj, Rana, Prerna, Srivastava, Aman, Surnis, Mayuresh, Susobhanan, Abhimanyu, Takahashi, Keitaro
A pulsar's pulse profile gets broadened at low frequencies due to dispersion along the line of sight or due to multi-path propagation. The dynamic nature of the interstellar medium makes both of these effects time-dependent and introduces slowly vary
Externí odkaz:
http://arxiv.org/abs/2309.16765
Autor:
Paladi, Avinash Kumar, Dwivedi, Churchil, Rana, Prerna, K, Nobleson, Susobhanan, Abhimanyu, Joshi, Bhal Chandra, Tarafdar, Pratik, Deb, Debabrata, Arumugam, Swetha, Gopakumar, A, Krishnakumar, M A, Batra, Neelam Dhanda, Debnath, Jyotijwal, Kareem, Fazal, Arumugam, Paramasivan, Bagchi, Manjari, Bathula, Adarsh, Dandapat, Subhajit, Desai, Shantanu, Gupta, Yashwant, Hisano, Shinnosuke, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Kolhe, Neel, Maan, Yogesh, Manoharan, P K, Singha, Jaikhomba, Srivastava, Aman, Surnis, Mayuresh, Takahashi, Keitaro
The wideband timing technique enables the high-precision simultaneous estimation of pulsar Times of Arrival (ToAs) and Dispersion Measures (DMs) while effectively modeling frequency-dependent profile evolution. We present two novel independent method
Externí odkaz:
http://arxiv.org/abs/2304.13072
Autor:
Allen, Bruce, Dhurandhar, Sanjeev, Gupta, Yashwant, McLaughlin, Maura, Natarajan, Priyamvada, Shannon, Ryan M., Thrane, Eric, Vecchio, Alberto
Pulsar timing arrays (PTAs) provide a way to detect gravitational waves at nanohertz frequencies. In this band, the most likely signals are stochastic, with a power spectrum that rises steeply at lower frequencies. Indeed, the observation of a common
Externí odkaz:
http://arxiv.org/abs/2304.04767
Autor:
Srivastava, Aman, Desai, Shantanu, Kolhe, Neel, Surnis, Mayuresh, Joshi, Bhal Chandra, Susobhanan, Abhimanyu, Chalumeau, Aurélien, Hisano, Shinnosuke, K., Nobleson, Arumugam, Swetha, Kharbanda, Divyansh, Singha, Jaikhomba, Tarafdar, Pratik, Arumugam, P, Bagchi, Manjari, Bathula, Adarsh, Dandapat, Subhajit, Dey, Lankeswar, Dwivedi, Churchil, Girgaonkar, Raghav, Gopakumar, A., Gupta, Yashwant, Kikunaga, Tomonosuke, Krishnakumar, M. A., Liu, Kuo, Maan, Yogesh, Manoharan, P K, Paladi, Avinash Kumar, Rana, Prerna, Shaifullah, Golam M., Takahashi, Keitaro
The Indian Pulsar Timing Array (InPTA) collaboration has recently made its first official data release (DR1) for a sample of 14 pulsars using 3.5 years of uGMRT observations. We present the results of single-pulsar noise analysis for each of these 14
Externí odkaz:
http://arxiv.org/abs/2303.12105
Autor:
S., Girish B., S., Harshavardhan Reddy, Sethi, Shiv, S., Srivani K., R., Abhishek, B., Ajithkumar, Bhattramakki, Sahana, Buch, Kaushal, Chaudhuri, Sandeep, Gupta, Yashwant, A., Kamini P., Kudale, Sanjay, S., Madhavi, Muley, Mekhala, T., Prabu, A., Raghunathan, J, Shelton G.
Backed by advances in digital electronics, signal processing, computation, and storage technologies, aperture arrays, which had strongly influenced the design of telescopes in the early years of radio astronomy, have made a comeback. Amid all these d
Externí odkaz:
http://arxiv.org/abs/2301.06707
Autor:
Joshi, Bhal Chandra, Gopakumar, Achamveedu, Pandian, Arul, Prabu, Thiagaraj, Dey, Lankeswar, Bagchi, Manjari, Desai, Shantanu, Tarafdar, Pratik, Rana, Prerna, Maan, Yogesh, Batra, Neelam Dhanda, Girgaonkar, Raghav, Agarwal, Nikita, Arumugam, Paramasivan, Banik, Sarmistha, Basu, Avishek, Bathula, Adarsh, Dandapat, Subhajit, Gupta, Yashwant, Hisano, Shinnosuke, Kato, Ryo, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Kolhe, Neel, Krishnakumar, M. A., Manoharan, P. K., Marmat, Piyush, Naidu, Arun, Nobleson, K., Paladi, Avinash Kumar, Pathak, Dhruv, Singha, Jaikhomba, Srivastava, Aman, Surnis, Mayuresh, Susarla, Sai Chaitanya, Susobhanan, Abhimanyu, Takahashi, Keitaro
Decades long monitoring of millisecond pulsars, which exhibit highly stable rotational periods, in pulsar timing array experiments is on the threshold of discovering nanohertz stochastic gravitational wave background. This paper describes the Indian
Externí odkaz:
http://arxiv.org/abs/2207.06461
Autor:
Tarafdar, Pratik, K., Nobleson, Rana, Prerna, Singha, Jaikhomba, Krishnakumar, M. A., Joshi, Bhal Chandra, Paladi, Avinash Kumar, Kolhe, Neel, Batra, Neelam Dhanda, Agarwal, Nikita, Bathula, Adarsh, Dandapat, Subhajit, Desai, Shantanu, Dey, Lankeswar, Hisano, Shinnosuke, Ingale, Prathamesh, Kato, Ryo, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Marmat, Piyush, Pandian, B. Arul, Prabu, T., Srivastava, Aman, Surnis, Mayuresh, Susarla, Sai Chaitanya, Susobhanan, Abhimanyu, Takahashi, Keitaro, Arumugam, P., Bagchi, Manjari, Banik, Sarmistha, De, Kishalay, Girgaonkar, Raghav, Gopakumar, A., Gupta, Yashwant, Maan, Yogesh, Manoharan, P. K., Naidu, Arun, Pathak, Dhruv
Publikováno v:
Publications of the Astronomical Society of Australia, Volume 39, 2022, e053
We present the pulse arrival times and high-precision dispersion measure estimates for 14 millisecond pulsars observed simultaneously in the 300-500 MHz and 1260-1460 MHz frequency bands using the upgraded Giant Metrewave Radio Telescope (uGMRT). The
Externí odkaz:
http://arxiv.org/abs/2206.09289
Autor:
Nobleson, K, Agarwal, Nikita, Girgaonkar, Raghav, Pandian, Arul, Joshi, Bhal Chandra, Krishnakumar, M A, Susobhanan, Abhimanyu, Desai, Shantanu, Prabu, T, Bathula, Adarsh, Pennucci, Timothy T, Banik, Sarmistha, Bagchi, Manjari, Batra, Neelam Dhanda, Choudhary, Arpita, Dandapat, Subhajit, Dey, Lankeswar, Gupta, Yashwant, Hisano, Shinnosuke, Kato, Ryo, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Kolhe, Neel, Maan, Yogesh, Marmat, Piyush, Arumugam, P, Manoharan, P K, Pathak, Dhruv, Singha, Jaikhomba, Surnis, Mayuresh P, Susarla, Sai Chaitanya, Takahashi, Keitaro
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 t
Externí odkaz:
http://arxiv.org/abs/2112.06908