Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Rana, Prerna"'
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
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
Gravitational Waves from Black-Hole Encounters: Prospects for Ground- and Galaxy-Based Observatories
Autor:
Dandapat, Subhajit, Ebersold, Michael, Susobhanan, Abhimanyu, Rana, Prerna, Gopakumar, Achamveedu, Tiwari, Shubhanshu, Haney, Maria, Lee, Hyung Mok, Kolhe, Neel
Close hyperbolic encounters of black holes (BHs) generate certain Burst With Memory (BWM) events in the frequency windows of the operational, planned, and proposed gravitational wave (GW) observatories. We present detailed explorations of the detecta
Externí odkaz:
http://arxiv.org/abs/2305.19318
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:
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:
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:
Rana, Prerna, Mangalam, A.
We study the bound orbit conditions for equatorial and eccentric orbits around a Kerr black hole both in the parameter space ($E$, $L$, $a$) representing the energy, angular momentum of the test particle, and spin of the black hole, and also ($e$, $\
Externí odkaz:
http://arxiv.org/abs/2207.05609
Autor:
Rana, Prerna, Mangalam, A.
We derive the conditions for a non-equatorial eccentric bound orbit to exist around a Kerr black hole in two-parameter spaces: the energy, angular momentum of the test particle, spin of the black hole, and Carter's constant space ($E$, $L$, $a$, $Q$)
Externí odkaz:
http://arxiv.org/abs/2207.05594
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:
Singha, Jaikhomba, Surnis, Mayuresh P, Joshi, Bhal Chandra, Tarafdar, Pratik, Rana, Prerna, Susobhanan, Abhimanyu, Girgaonkar, Raghav, Kolhe, Neel, Agarwal, Nikita, Desai, Shantanu, Prabu, T, Bathula, Adarsh, Dandapat, Subhajit, Dey, Lankeswar, Hisano, Shinnosuke, Kato, Ryo, Kharbanda, Divyansh, Kikunaga, Tomonosuke, Marmat, Piyush, Susarla, Sai Chaitanya, Bagchi, Manjari, Batra, Neelam Dhanda, Choudhury, Arpita, Gopakumar, A, Gupta, Yashwant, Krishnakumar, M A, Maan, Yogesh, Manoharan, P K, Nobleson, K, Pandian, Arul, Pathak, Dhruv, Takahashi, Keitaro
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 April 16, 2021 (MJD 59320) and April 17, 2021 (MJD 59321). In this paper, we repo
Externí odkaz:
http://arxiv.org/abs/2107.04607