submitted 1 paper
Revisiting wideband pulsar timing measurements
Abhimanyu Susobhanan, Avinash Kumar Paladi, Réka Desmecht, Amarnath, Manjari Bagchi, Manoneeta Chakraborty, Shaswata Chowdhury, Suruj Jyoti Das, Debabrata Deb, Shantanu Desai, Churchil Dwivedi, Himanshu Grover, Jibin Jose, Bhal Chandra Joshi, Shubham Kala, Fazal Kareem, Kuldeep Meena, Sushovan Mondal, K Nobleson, Arul Pandian B, Kaustubh Rai, Adya Shukla, Manpreet Singh, Aman Srivastava, Mayuresh Surnis, Hemanga Tahbildar, Keitaro Takahashi, Pratik Tarafdar, Kunjal Vara, Vaishnavi Vyasraj, Zenia Zuraiq,
2026 5 papers
Skewness in the Hellings-Downs curve
Ryosuke Fujimoto, Keitaro Takahashi,
The Indian Pulsar Timing Array Data Release 2: II. Customised Single-Pulsar Noise Analysis and Noise Budget
K. Nobleson, Churchil Dwivedi, Shantanu Desai, Bhal Chandra Joshi, Himanshu Grover, Debabrata Deb, Vaishnavi Vyasraj, Kunjal Vara, Hemanga Tahbildar, Abhimanyu Susobhanan, Mayuresh Surnis, Aman Srivastava, Shubhit Sardana, Keitaro Takahashi, Amarnath, P. Arumugam, Manjari Bagchi, Neelam Dhanda Batra, Manoneeta Chakraborty, Shaswata Chowdhury, Shebin Jose Jacob, Jibin Jose, Shubham Kala, Ryo Kato, M. A. Krishnakumar, Kuldeep Meena, Avinash Kumar Paladi, Arul Pandian, Kaustubh Rai, Prerna Rana, Manpreet Singh, Jaikhomba Singha, Adya Shukla, Pratik Tarafdar, Prabu Thiagraj, Zenia Zuraiq,
Rotational Doppler Cartography of Technosignatures on Unresolved Planets
Keitaro Takahashi,
Effects of Coronal Mass Ejection on PSR J1022+1001 and Possible Mode Change of PSR J2145-0750 in the InPTA DR2
Shaswata Chowdhury, M. A. Krishnakumar, Manjari Bagchi, Bhal Chandra Joshi, Nobleson K., Jibin Jose, Shantanu Desai, Manpreet Singh, Vaishnavi Vyasraj, Kuldeep Meena, Amarnath, Manoneeta Chakraborty, Shubham Kala, Debabrata Deb, Zenia Zuraiq, Arul Pandian B, Neelam Dhanda Batra, Churchil Dwivedi, Sushovan Mondal, Avinash Kumar Paladi, Kaustubh Rai, Abhimanyu Susobhanan, Adya Shukla, Aman Srivastava, Mayuresh Surnis, Hemanga Tahbildar, Keitaro Takahashi, Pratik Tarafdar, Prabu Thiagaraj, Kunjal Vara,
Realistic assessment of a single gravitational wave source localization taking into account precise pulsar distances with pulsar timing arrays
Ryo Kato, Keitaro Takahashi,
2025 7 papers
Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data
F. Iraci, A. Chalumeau, C. Tiburzi, J. P. W. Verbiest, A. Possenti, S. C. Susarla, M. A. Krishnakumar, G. M. Shaifullah, J. Antoniadis, M. Bagchi, C. Bassa, R. N. Caballero, B. Cecconi, S. Chen, S. Chowdhury, B. Ciardi, I. Cognard, S. Corbel, S. Desai, D. Deb, J. Girard, A. Golden, J-M. Grießmeier, L. Guillemot, M. Hoeft, H. Hu, F. Jankowski, G. Janssen, B. C. Joshi, S. Kala, E. Keane, K. Nobelson, A. Konovalenko, I. Kravtsov, M. Kramer, K. Liu, A. Parthasarathy, P. Rana, D. Schwarz, J. Singha, A. Srivastava, K. Takahashi, P. Tarafdar, G. Theureau, O. Ulyanov, C. Vocks, J. Wang, V. Zakharenko, P. Zarka,
The SKAO Pulsar Timing Array
Ryan M. Shannon, N. D. Ramesh Bhat, Aurelien Chalumeau, Siyuan Chen, H. Thankful Cromartie, A. Gopukumar, Kathrin Grunthal, Jeffrey S. Hazboun, Francesco Iraci, Bhal Chandra Joshi, Ryo Kato, Michael J. Keith, Kejia Lee, Kuo Liu, Hannah Middleton, Matthew T. Miles, Chiara M. F. Mingarelli, Aditya Parthasarathy, Daniel J. Reardon, Golam M. Shaifullah, Keitaro Takahashi, Caterina Tiburzi, Riccardo J. Truant, Xiao Xue, Andrew Zic, The SKAO Pulsar Science Working Group,
Improved limits on the 21cm signal at z=6.5-7.0 with the MWA using Gaussian information
Cathryn M. Trott, C. D. Nunhokee, D. Null, N. Barry, Y. Qin, R.B. Wayth, J.L.B. Line, C.H. Jordan, B. Pindor, J.H. Cook, J. Bowman, A. Chokshi, J. Ducharme, K. Elder, Q. Guo, B.J. Hazelton, W. Hidayat, T. Ito, D. Jacobs, E. Jong, M. Kolopanis, T. Kunicki, E. Lilleskov, M.F. Morales, J. Pober, A. Selvaraj, R. Shi, K. Takahashi, S.J. Tingay, R.L. Webster, S. Yoshiura, Q. Zheng,
Square Kilometre Array Science Data Challenge 3a: foreground removal for an EoR experiment
A. Bonaldi, et al.,
Limits on the 21 cm power spectrum at z=6.5-7.0 from MWA observations
Nunhokee, C. D. ; Null, D. ; Trott, C. M ; Barry, N. ; Qin, Y. ; Wayth, R. B. ; Line, J. L. B. ; Jordan, C. H. ; Pindor, B. ; Cook, J. H. ; Bowman, J. ; Chokshi, A. ; Ducharme, J. ; Elder, K. ; Guo, Q. ; Hazelton, B. ; Hidayat, W. ; Ito, T. ; Jacobs, D. ; Jong, E. ; Kolopanis, M. ; Kunicki, T. ; Lilleskov, E. ; Morales, M. F. ; Pober, J. C. ; Selvaraj, A. ; Shi, R. ; Takahashi, K. ; Tingay, S. J. ; Webster, R. L. ; Yoshiura, S. ; Zheng, Q.,
The Indian Pulsar Timing Array Data Release 2: I. Dataset and Timing Analysis
Rana, Prerna ; Tarafdar, Pratik ; K, Nobleson ; Dwivedi, Churchil ; Joshi, Bhal Chandra ; Deb, Debabrata ; Mondal, Sushovan ; Krishnakumar, M. A. ; Shukla, Adya ; Singha, Jaikhomba ; Grover, Himanshu ; Tahbildar, Hemanga ; Susobhanan, Abhimanyu ; Surnis, Mayuresh ; Desai, Shantanu ; Dhanda Batra, Neelam ; Srivastava, Aman ; Bharambe, Vinay ; Jose, Jibin ; Vyasraj, Vaishnavi ; Jacob, Shebin Jose ; Amarnath ; Singh, Manpreet ; Zuraiq, Zenia ; Sengupta, Sarbartha ; Ogi, Toki ; Kumar, Dhruv ; Jagadeesh, S ; Kareem, Fazal ; Maity, Deep ; Rai, Kaustubh ; Vara, Kunjal ; Chowdhury, Shaswata ; Kato, Ryo ; Arumugam, Swetha ; Mamidipaka, Pragna ; Pandian B, Arul ; Shaji, Kavya ; Thiagaraj, Prabu ; Arumugam, P. ; Bagchi, Manjari ; Chakraborty, Manoneeta ; Gopakumar, A. ; Gupta, Yashwant ; Maan, Yogesh ; Paladi, Avinash Kumar ; Takahashi, Keitaro,
Strong ionospheric activity at the MWA site associated with plasma bubble measured by GNSS
Yoshiura, Shintaro ; Otsuka, Yuichi ; Trott, Cathryn M. search by orcid ; Null, Dev ; Nishitani, Nozomu ; Takahashi, Keitaro ; Nishioka, Michi ; Perwitasari, Septi ; Shinbori, Atsuki,
2024 7 papers
Using low-frequency scatter-broadening measurements for precision estimates of dispersion measures
Jaikhomba Singha, Bhal Chandra Joshi, M. A. Krishnakumar, Fazal Kareem, Adarsh Bathula, Churchil Dwivedi, Shebin Jose Jacob, Shantanu Desai, Pratik Tarafdar, P. Arumugam, Swetha Arumugam, Manjari Bagchi, Neelam Dhanda Batra, Subhajit Dandapat, Debabrata Deb, Jyotijwal Debnath, A Gopakumar, Yashwant Gupta, Shinnosuke Hisano, Ryo Kato, Tomonosuke Kikunaga, Piyush Marmat, K. Nobleson, Avinash K. Paladi, Arul Pandian B., Thiagaraj Prabu, Prerna Rana, Aman Srivastava, Mayuresh Surnis, Abhimanyu Susobhanan, Keitaro Takahashi,
The second data release from the European Pulsar Timing Array V. Search for continuous gravitational wave signals
EPTA Collaboration ; InPTA Collaboration,
Comparing recent PTA results on the nanohertz stochastic gravitational wave background
IPTA Collaboration,
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
EPTA Collaboration ; InPTA Collaboration,
Low-frequency pulse-jitter measurement with the uGMRT I : PSR J0437−4715
Tomonosuke Kikunaga, Shinnosuke Hisano, Neelam Dhanda Batra, Shantanu Desai, Bhal Chandra Joshi, Manjari Bagchi, T. Prabu, Keitaro Takahashi, Swetha Arumugam, Adarsh Bathula, Subhajit Dandapat, Debabrata Deb, Churchil Dwivedi, A. Gopakumar, Yashwant Gupta, Shebin Jose Jacob, Fazal Kareem, Nobleson K, Pragna Mamidipaka, Avinash Kumar Paladi, Arul Pandian B, Prerna Rana, Jaikhomba Singha, Aman Srivastava, Mayuresh Surnis, Pratik Tarafdar,
A search for auroral radio emission from β Pictoris b
Yuta Shiohira, Yuka Fujii, Hajime Kita, Tomoki Kimura, Yuka Terada, Keitaro Takahashi,
Multi-band Extension of the Wideband Timing Technique
Avinash Kumar Paladi, Churchil Dwivedi, Prerna Rana, Nobleson K, Abhimanyu Susobhanan, Bhal Chandra Joshi, Pratik Tarafdar, Debabrata Deb, Swetha Arumugam, A Gopakumar, M A Krishnakumar, Neelam Dhanda Batra, Jyotijwal Debnath, Fazal Kareem, Paramasivan Arumugam, Manjari Bagchi, Adarsh Bathula, Subhajit Dandapat, Shantanu Desai, Yashwant Gupta, Shinnosuke Hisano, Divyansh Kharbanda, Tomonosuke Kikunaga, Neel Kolhe, Yogesh Maan, P K Manoharan, Jaikhomba Singha, Aman Srivastava, Mayuresh Surnis, Keitaro Takahashi,
2023 7 papers
Precision of localization of single gravitational-wave source with pulsar timing array
Ryo Kato and Keitaro Takahashi,
The second data release from the European Pulsar Timing Array. III. Search for gravitational wave signals
EPTA Collaboration ; InPTA Collaboration,
The second data release from the European Pulsar Timing Array. II. Customised pulsar noise models for spatially correlated gravitational waves
EPTA Collaboration ; InPTA Collaboration,
Noise analysis in the Indian Pulsar Timing Array Data Release I
Aman Srivastava, Shantanu Desai, Neel Kolhe, Mayuresh Surnis, Bhal Chandra Joshi, Abhimanyu Susobhanan, Aurélien Chalumeau, Shinnosuke Hisano, Nobleson K., Swetha Arumugam, Divyansh Kharbanda, Jaikhomba Singha, Pratik Tarafdar, P Arumugam, Manjari Bagchi, Adarsh Bathula, Subhajit Dandapat, Lankeswar Dey, Churchil Dwivedi, Raghav Girgaonkar, A. Gopakumar, Yashwant Gupta, Tomonosuke Kikunaga, M. A. Krishnakumar, Kuo Liu, Yogesh Maan, P K Manoharan, Avinash Kumar Paladi, Prerna Rana, Golam M. Shaifullah, Keitaro Takahashi,
Introduction to Faraday tomography and its future prospects
Keitaro TAKAHASHI,
Wavelets and sparsity for Faraday tomography
Suchetha Cooray, Tsutomu T. Takeuchi, Shinsuke Ideguchi, Takuya Akahori, Yoshimitsu Miyashita, Keitaro Takahashi,
Testing the non-circularity of the spacetime around Sagittarius A* with orbiting pulsars
Yohsuke TAKAMORI, Atsushi NARUKO, Yusuke SAKURAI, Keitaro TAKAHASHI, Daisuke YAMAUCHI, and Chul-Moon Yoo,
2022 6 papers
The Indian Pulsar Timing Array: First data release
Pratik Tarafdar, Nobleson K., Prerna Rana, Jaikhomba Singha, M. A. Krishnakumar, Bhal Chandra Joshi, Avinash Kumar Paladi, Neel Kolhe, Neelam Dhanda Batra, Nikita Agarwal, Adarsh Bathula, Subhajit Dandapat, Shantanu Desai, Lankeswar Dey, Shinnosuke Hisano, Prathamesh Ingale, Ryo Kato, Divyansh Kharbanda, Tomonosuke Kikunaga, Piyush Marmat, B. Arul Pandian, T. Prabu, Aman Srivastava, Mayuresh Surnis, Sai Chaitanya Susarla, Abhimanyu Susobhanan, Keitaro Takahashi, P. Arumugam, Manjari Bagchi, Sarmistha Banik, Kishalay De, Raghav Girgaonkar, A. Gopakumar, Yashwant Gupta, Yogesh Maan, P. K. Manoharan, Arun Naidu, Dhruv Pathak,
On the Potential of Faraday Tomography to Identify Shock Structures in Supernova Remnants
Shinsuke Ideguchi, Tsuyoshi Inoue, Takuya Akahori and Keitaro Takahashi,
Low-frequency wideband timing of InPTA pulsars observed with the uGMRT
K Nobleson, Nikita Agarwal, Raghav Girgaonkar, Arul Pandian, Bhal Chandra Joshi, M A Krishnakumar, Abhimanyu Susobhanan, Shantanu Desai, T Prabu, Adarsh Bathula, Timothy T Pennucci, Sarmistha Banik, Manjari Bagchi, Neelam Dhanda Batra, Arpita Choudhary, Subhajit Dandapat, Lankeswar Dey, Yashwant Gupta, Shinnosuke Hisano, Ryo Kato, Divyansh Kharbanda, Tomonosuke Kikunaga, Neel Kolhe, Yogesh Maan, Piyush Marmat, P Arumugam, P K Manoharan, Dhruv Pathak, Jaikhomba Singha, Mayuresh P Surnis, Sai Chaitanya Susarla, Keitaro Takahashi,
A Parkes "Murriyang" Search for Pulsars and Transients in the Large Magellanic Cloud
Shinnosuke Hisano, Fronefield Crawford, Victoria Bonidie, Md F. Alam, Keitaro Takahashi, Duncan R. Lorimer, Josh P. Ridley, Maura M. McLaughlin, Benetge B. P. Perera,
Constraints on ultra-low-frequency gravitational waves from an eccentric supermassive black hole binary
Tomonosuke Kikunaga, Shinnosuke Hisano, Hiroki Kumamoto, and Keitaro Takahashi,
Axion Cloud Decay due to the Axion-photon Conversion with Background Magnetic Fields
Yoo, Chul-Moon; Naruko, Atsushi; Sakurai, Yusuke; Takahashi, Keitaro; Takamori, Yohsuke; Yamauchi, Daisuke,
2021 9 papers
Epoch of Reionization Power Spectrum Limits from Murchison Widefield Array Data Targeted at EoR1 Field
M. Rahimi, B. Pindor, J. L. B. Line, N. Barry, C. M. Trott, R. L. Webster, C. H. Jordan, M. Wilensky, S. Yoshiura, A. Beardsley, J. Bowman, R. Byrne, A. Chokshi, B. J. Hazelton, K. Hasegawa, E. Howard, B. Greig, D. Jacobs, R. Joseph, M. Kolopanis, C. Lynch, B. McKinley, D. A. Mitchell, S. Murray, M. F. Morales, J. C. Pober, K. Takahashi, S. J. Tingay, R. B. Wayth, J. S. B. Wyithe, Q. Zheng,
Constraining the 21cm brightness temperature of the IGM at z=6.6 around LAEs with the Murchison Widefield Array
Cathryn M. Trott, C.H. Jordan, J.L.B. Line, C.R. Lynch, S. Yoshiura, B. McKinley, P. Dayal, B. Pindor, A. Hutter, K. Takahashi, R.B. Wayth, N. Barry, A. Beardsley, J. Bowman, R. Byrne, A. Chokshi, B. Greig, K. Hasegawa, B.J. Hazelton, E. Howard, D. Jacobs, M. Kolopanis, D.A. Mitchell, M.F. Morales, S. Murray, J.C. Pober, M. Rahimi, S.J. Tingay, R.L. Webster, M. Wilensky, J.S.B. Wyithe, Q. Zheng,
Evidence for profile changes in PSR J1713+0747 using the uGMRT
Jaikhomba Singha, Mayuresh P Surnis, Bhal Chandra Joshi, Pratik Tarafdar, Prerna Rana, Abhimanyu Susobhanan, Raghav Girgaonkar, Neel Kolhe, Nikita Agarwal, Shantanu Desai, T Prabu, Adarsh Bathula, Subhajit Dandapat, Lankeswar Dey, Shinnosuke Hisano, Ryo Kato, Divyansh Kharbanda, Tomonosuke Kikunaga, Piyush Marmat, Sai Chaitanya Susarla, Manjari Bagchi, Neelam Dhanda Batra, Arpita Choudhury, A Gopakumar, Yashwant Gupta, M A Krishnakumar, Yogesh Maan, P K Manoharan, K Nobleson, Arul Pandian, Dhruv Pathak, Keitaro Takahashi,
Predicting 21cm-line map from Lyman α emitter distribution with Generative Adversarial Networks
Shintaro Yoshiura, Hayato Shimabukuro, Kenji Hasegawa, Keitaro Takahashi,
A new MWA limit on the 21 cm Power Spectrum at Redshifts ∼ 13 - 17
S. Yoshiura, B. Pindor, J.L.B. Line, N. Barry, C. M. Trott, A. Beardsley, J. Bowman, R. Byrne, A. Chokshi, B. J. Hazelton, K. Hasegawa, E. Howard, B. Greig, D. Jacobs, C. H. Jordan, R. Joseph, M. Kolopanis, C. Lynch, B. McKinley, D. A. Mitchell, M. F. Morales, S. Murray, J. C. Pober, M. Rahimi, K. Takahashi, S. J. Tingay, R. B. Wayth, R. L. Webster, M. Wilensky, J. S. B. Wyithe, Z. Zhang, Q. Zheng,
Constraints on ultra-low-frequency gravitational waves with statistics of pulsar spin-down rates II: Mann-Whitney U test
Kumamoto, H.; Hisano, S.; Takahashi, K.,
Flux density variability of 286 radio pulsars from a decade of monitoring
H. Kumamoto, S. Dai, S. Johnston, M. Kerr, R. M. Shannon, P. Weltevrede, C. Sobey, R. N. Manchester, G. Hobbs, and K. Takahashi,
Searching for gravitational wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array
N. Yonemaru, S. Kuroyanagi, G. Hobbs, K. Takahashi, X.-J. Zhu, W. A. Coles, S. Dai, E. Howard, R. Manchester, D. Reardon, C. Russell, R. Shannon, N. Thyagarajan, R. Spiewak, J.-B. Wang,
An Iterative Reconstruction Algorithm for Faraday Tomography
Suchetha Cooray, Tsutomu T. Takeuchi, Takuya Akahori, Yoshimitsu Miyashita, Shinsuke Ideguchi, Keitaro Takahashi and Kiyotomo Ichiki,
2020 8 papers
The Impact of Tandem Redundant/Sky-Based Calibration in MWA Phase II Data Analysis
Zhang, Zheng; Pober, Jonathan C.; Li, Wenyang; Hazelton, Bryna J.; Morales, Miguel F.; Trott, Cathryn M.; Jordan, Christopher H.; Joseph, Ronniy C.; Beardsley, Adam; Barry, Nichole; Byrne, Ruby; Tingay, Steven J.; Chokshi, Aman; Hasegawa, Kenji; Jacobs, Daniel C.; Lanman, Adam; Line, Jack L. B.; Lynch, Christene; McKinley, Benjamin; Mitchell, Daniel A. Murray, Steven; Pindor, Bart; Rahimi, Mahsa; Takahashi, Keitaro; Wayth, Randall B.; Webster, Rachel L.; Wilensky, Michael; Yoshiura, Shintaro; Zheng, Qian,
Constraints on Primordial Power Spectrum from Galaxy Luminosity Functions
Yoshiura, Shintaro; Oguri, Masamune; Takahashi, Keitaro; Takahashi, Tomo,
Faraday dispersion function of disk galaxies with axisymmetric global magnetic fields I
Haruya Eguchi, Masaki Suzuki, Yoshimitsu Miyashita, Shinsuke Ideguchi, Keitaro Takahashi,
Microlensed Radio Emission from Exoplanets
Yuta Shiohira, Yuka Terada, Den Mukuno, Yuka Fujii, Keitaro Takahashi,
Probing Small Scale Primordial Power Spectrum with 21cm Line Global Signal
Yoshiura, Shintaro; Takahashi, Keitaro; Takahashi, Tomo,
Detectability of 21cm signal during the Epoch of Reionization with 21cm-Lyman-α emitter cross-correlation. III. Model dependence
Kenji Kubota, Akio. K. Inoue, Kenji Hasegawa, Keitaro Takahashi,
Artificial neural networks for selection of pulsar candidates from the radio continuum surveys
Naoyuki Yonemaru, Keitaro Takahashi, Hiroki Kumamoto, Shi Dai, Shintaro Yoshiura and Shinsuke Ideguchi,
Deep multi-redshift limits on Epoch of Reionisation 21cm Power Spectra from Four Seasons of Murchison Widefield Array Observations
Cathryn M. Trott, C. H. Jordan, S. Midgley, N. Barry, B. Greig, B. Pindor, J. H. Cook, G. Sleap, S. J. Tingay, D. Ung, P. Hancock, A. Williams, J. Bowman, R. Byrne, A. Chokshi, B. J. Hazelton, K. Hasegawa, D. Jacobs, R. C. Joseph, W. Li, J.L.B Line, C. Lynch, B. McKinley, D. A. Mitchell, M. F. Morales, M. Ouchi, J. C. Pober, M. Rahimi, K. Takahashi, R. B. Wayth, R. L. Webster, M. Wilensky, J. S. B. Wyithe, S. Yoshiura, Z. Zhang, Q. Zheng,
2019 9 papers
Science with the Murchison Widefield Array: Phase I results and Phase II opportunities
Beardsley, A. P.; Johnston-Hollitt, M.; Trott, C. M.; Pober, J. C.; Morgan, J.; Oberoi, D.; Kaplan, D. L.; Lynch, C. R.; Anderson, G. E.; McCauley, P. I.; Croft, S.; James, C. W.; Wong, O. I.; Tremblay, C. D.; Norris, R. P.; Cairns, I. H.; Lonsdale, C. J.; Hancock, P. J.; Gaensler, B. M.; Bhat, N. D. R. Li, W.; Hurley-Walker, N.; Callingham, J. R.; Seymour, N.; Yoshiura, S.; Joseph, R. C.; Takahashi, K.; Sokolowski, M.; Miller-Jones, J. C. A.; Chauhan, J. V.; Bojičić, I.; Filipović, M. D.; Leahy, D.; Su, H.; Tian, W. W.; McSweeney, S. J.; Meyers, B. W.; Kitaeff, S.; Vernstrom, T.; Gürkan, G.; Heald, G.; Xue, M.; Riseley, C. J.; Duchesne, S. W.; Bowman, J. D.; Jacobs, D. C.; Crosse, B.; Emrich, D.; Franzen, T. M. O.; Horsley, L.; Kenney, D.; Morales, M. F.; Pallot, D.; Steele, K.; Tingay, S. J.; Walker, M.; Wayth, R. B.; Williams, A.; Wu, C.,
First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7
Li, W.; Pober, J. C.; Barry, N.; Hazelton, B. J.; Morales, M. F.; Trott, C. M.; Lanman, A.; Wilensky, M.; Sullivan, I.; Beardsley, A. P.; Booler, T.; Bowman, J. D.; Byrne, R.; Crosse, B.; Emrich, D.; Franzen, T. M. O.; Hasegawa, K.; Horsley, L.; Johnston-Hollitt, M.; Jacobs, D. C. Jordan, C. H.; Joseph, R. C.; Kaneuji, T.; Kaplan, D. L.; Kenney, D.; Kubota, K.; Line, J.; Lynch, C.; McKinley, B.; Mitchell, D. A.; Murray, S.; Pallot, D.; Pindor, B.; Rahimi, M.; Riding, J.; Sleap, G.; Steele, K.; Takahashi, K.; Tingay, S. J.; Walker, M.; Wayth, R. B.; Webster, R. L.; Williams, A.; Wu, C.; Wyithe, J. S. B.; Yoshiura, S.; Zheng, Q.,
Constraints on ultra-low-frequency gravitational waves with statistics of pulsar spin-down rates
Hiroki Kumamoto, Yuya Imasato, Naoyuki Yonemaru, Keitaro Takahashi, Sachiko Kuroyanagi,
Gridded and direct Epoch of Reionisation bispectrum estimates using the Murchison Widefield Array
Cathryn M. Trott, Catherine A. Watkinson, Christopher H. Jordan, Shintaro Yoshiura, Suman Majumdar, N. Barry, R. Byrne, B.J. Hazelton, K. Hasegawa, R. Joseph, T. Kaneuji, K. Kubota, W. Li, J. Line, C. Lynch, B. McKinley, D.A. Mitchell, M.F. Morales, S. Murray, B. Pindor, J.C. Pober, M. Rahimi, J. Riding, K. Takahashi, S.J. Tingay, R.B. Wayth, R.L. Webster, M. Wilensky, J.S.B. Wyithe, Q. Zheng, David Emrich, A.P. Beardsley, T. Booler, B. Crosse, T.M.O. Franzen, L. Horsley, M. Johnston-Hollitt, D.L. Kaplan, D. Kenney, D. Pallot, G. Sleap, K. Steele, M. Walker, A. Williams, C. Wu,
Detailed study of detection method for ultra-low-frequency gravitational waves with pulsar spin-down rate statistics
Shinnosuke Hisano, Naoyuki Yonemaru, Hiroki Kumamoto, Keitaro Takahashi,
Robust statistics toward detection of the 21 cm signal from the Epoch of Reionisation
Cathryn M. Trott, Shih Ching Fu, Steven Murray, Christopher Jordan, Jack Line, N. Barry, R.Byrne, B. J. Hazelton, K. Hasegawa, R. Joseph, T. Kaneuji, K. Kubota, W. Li, C. Lynch, B. McKinley, D.A. Mitchell, M.F. Morales, B. Pindor, J.C. Pober, M. Rahimi, K. Takahashi, S.J. Tingay, R.B. Wayth, R.L. Webster, M. Wilensky, J.S.B. Wyithe, S. Yoshiura, Q. Zheng, M. Walker,
The intergalactic magnetic field probed by a giant radio galaxy
S. P. O'Sullivan, J. Machalski, C. L. Van Eck, G. Heald, M. Brüggen, J. P. U. Fynbo, K. E. Heintz, M. A. Lara-Lopez, V. Vacca, M. J. Hardcastle, T. W. Shimwell, C. Tasse, F. Vazza, H. Andernach, M. Birkinshaw, M. Haverkorn, C. Horellou, W. L. Williams, J. J. Harwood, G. Brunetti, J. M. Anderson, S. A Mao, B. Nikiel-Wroczynski, K. Takahashi, E. Carretti, T. Vernstrom, R. J. van Weeren, E. Orru, L. K. Morabito, and J. R. Callingham,
Study of systematics effects on the Cross Power Spectrum of 21 cm Line and Cosmic Microwave Background using Murchison Widefield Array Data
Shintaro Yoshiura, Kiyotomo Ichiki, Bart Pindor, Keitaro Takahashi, Hiroyuki Tashiro, Cathryn M. Trott,
Performance test of QU-fitting in cosmic magnetism study
Yoshimitsu Miyashita, Shinsuke Ideguchi, Shouta Nakagawa, Takuya Akahori, Keitaro Takahashi,
2018 7 papers
Optimum Frequency of Faraday Tomography to Explore the Inter-Galactic Magnetic Field in Filaments of Galaxies
Takuya Akahori, Shinsuke Ideguchi, Takahiro Aoki, Kazuhiro Takefuji, Hideki Ujihara, Keitaro Takahashi,
Impact of EDGES 21cm Global Signal on Primordial Power Spectrum
Shintaro Yoshiura, Keitaro Takahashi, Tomo Takahashi,
Detectability of 21cm-signal during the Epoch of Reionization with 21cm-LAE cross-correlation
Kenji Kubota, Shintaro Yoshiura, Keitaro Takahashi, Kenji Hasegawa, Hidenobu Yajima, Masami Ouchi, Bart Pindor and Rachel L. Webster,
Detectability of 21cm-signal during the Epoch of Reionization with 21cm-LAE cross-correlation. II. Foreground contamination
Shintaro Yoshiura, Jack L. B. Line, Kenji Kubota, Kenji Hasegawa, Keitaro Takahashi,
Sensitivity of new detection method for ultra-low frequency gravitational waves with pulsar spin-down rate statistics
Naoyuki Yonemaru, Hiroki Kumamoto, Keitaro Takahashi, and Sachiko Kuroyanagi,
Cosmic Magnetism in Centimeter and Meter Wavelength Radio Astronomy
Takuya Akahori, Hiroyuki Nakanishi, Yoshiaki Sofue, Yutaka Fujita, Kiyotomo Ichiki, Shinsuke Ideguchi, Osamu Kameya, Takahiro Kudoh, Yuki Kudoh, Mami Machida, Yoshimitsu Miyashita, Hiroshi Ohno, Takeaki Ozawa, Keitaro Takahashi, Motokazu Takizawa, Dai G. Yamazaki,
The variance of dispersion measure of high-redshift transient objects as a probe of ionized bubble size during reionization
Shintaro Yoshiura and Keitaro Takahashi,
2017 6 papers
Constraining the Contribution of Galaxies and Active Galactic Nuclei to Cosmic Reionization
Shintaro Yoshiura, Kenji Hasegawa, Kiyotomo Ichiki, Hiroyuki Tashiro, Hayato Shimabukuro and Keitaro Takahashi,
Study of Vertical Magnetic Field in Face-on Galaxies using Faraday Tomography
Shinsuke Ideguchi, Yuichi Tashiro, Takuya Akahori, Keitaro Takahashi, Dongsu Ryu,
Constraining the EoR model parameters with the 21cm bispectrum
Hayato Shimabukuro, Shintaro Yoshiura, Keitaro Takahashi, Shuichiro Yokoyama, Kiyotomo Ichiki,
Multitracer technique for galaxy bispectrum - An application to constraints on non-local primordial non-Gaussianities -
Daisuke Yamauchi, Shuichiro Yokoyama and Keitaro Takahashi,
Anisotropies in the gravitational wave background as a probe of the cosmic string network
Sachiko Kuroyanagi, Keitaro Takahashi, Naoyuki Yonemaru, Hiroki Kumamoto,
Studying topological structure of 21-cm line fluctuations with 3D Minkowski functionals before reionization
Shintaro Yoshiura, Hayato Shimabukuro, Keitaro Takahashi, Takahiko Matsubara,
2016 8 papers
Cosmology with the Square Kilometre Array by SKA-Japan
Yamauchi, Daisuke; Ichiki, Kiyotomo; Kohri, Kazunori; Namikawa, Toshiya; Oyama, Yoshihiko; Sekiguchi, Toyokazu; Shimabukuro, Hayato; Takahashi, Keitaro; Takahashi, Tomo; Yokoyama, Shuichiro; Yoshikawa, Kohji,
Gravitational waves from a SMBH binary in M87
Naoyuki Yonemaru, Hiroki Kumamoto, Sachiko Kuroyanagi, Keitaro Takahashi and Joseph Silk,
Rapid Merger of Binary Primordial Black Holes
K. Hayasaki, K. Takahashi, Y. Sendouda and S. Nagataki,
Expected constraints on models of the epoch of reionization with the variance and skewness in redshifted 21cm-line fluctuations
Kenji Kubota, Shintaro Yoshiura, Hayato Shimabukuro and Keitaro Takahashi,
Probing primordial non-Gaussianity consistency relation with galaxy surveys
Daisuke Yamauchi and Keitaro Takahashi,
Performance test of RM CLEAN and its evaluation with chi-square value
Yoshimitsu Miyashita, Shinsuke Ideguchi and Keitaro Takahashi,
Using rotation measure grids to detect cosmological magnetic fields -- a Bayesian approach
V. Vacca, N. Oppermann, T. Ensslin, J. Jasche, M. Selig, M. Greiner, H. Junklewitz, M. Reinecke, M. Brueggen, E. Carretti, L. Feretti, C. Ferrari, C. A. Hales, C. Horellou, S. Ideguchi, M. Johnston-Hollitt, R. F. Pizzo, H. Roettgering, T. W. Shimwell and K. Takahashi,
21cm-line bispectrum as method to probe Cosmic Dawn and Epoch of Reionization
Hayato Shimabukuro, Shintaro Yoshiura, Keitaro Takahashi, Shuichiro Yokoyama and Kiyotomo Ichiki,
2015 5 papers
X-raying extended emission and rapid decay of short gamma-ray bursts
Yasuaki Kagawa, Daisuke Yonetoku, Tatsuya Sawano, Asuka Toyanago, Takashi Nakamura and Keitaro Takahashi, Kazumi Kashiyama and Kunihito Ioka,
Sensitivity for 21cm Bispectrum from Epoch of Reionization
Shintaro Yoshiura, Hayato Shimabukuro, Keitaro Takahashi, Rieko Momose, Hiroyuki Nakanishi and Hiroshi Imai,
Studying 21cm power spectrum with one-point statistics
Hayato Shimabukuro, Shintaro Yoshiura, Keitaro Takahashi, Shuichiro Yokoyama and Kiyotomo Ichiki,
Magnetic Field Spectrum at Cosmological Recombination Revisited
Shohei Saga, Kiyotomo Ichiki, Keitaro Takahashi and Naoshi Sugiyama,
COMPARISON OF ALGORITHMS FOR DETERMINATION OF ROTATION MEASURE AND FARADAY STRUCTURE I. 1100 - 1400 MHZ
X. H. Sun, L. Rudnick, Takuya Akahori, C. S. Anderson, M. R. Bell, J. D. Bray, J. S. Farnes, S.Ideguchi, K. Kumazaki, T. O’Brien, S. P. O’Sullivan, A. M. M. Scaife, R. Stepanov,7, J. Stil, K. Takahashi, R. J. van Weeren, M. Wolleben,
2014 7 papers
Constraining primordial non-Gaussianity via multi-tracer technique with Euclid and SKA
D. Yamauchi, K. Takahashi and M. Oguri,
Faraday Dispersion Functions of Galaxies
S. Ideguchi, Y. Tashiro, T. Akahori, K. Takahashi and D. Ryu,
Short Gamma Ray Burst Formation Rate from BATSE data using E_p-L_p correlation and the minimum gravitational wave event rate of coalescing compact binary
D. Yonetoku, T. Nakamura, K. Takahashi and A. Toyanago,
Exploring the Intergalactic Magnetic Field by Means of Faraday Tomography
T. Akahori, K. Kumazaki, K. Takahashi and D. Ryu,
Properties of Intrinsic Polarization Angle Ambiguities in Faraday Tomography
K. Kumazaki, T. Akahori, S. Ideguchi, T. Kurayama and K. Takahashi,
CMB ISW-lensing bispectrum from cosmic strings
D. Yamauchi, Y. Sendouda and K. Takahashi,
Fisher Analysis on Wide-Band Polarimetry for Probing the Intergalactic Magnetic Field
S. Ideguchi, K. Takahashi, T. Akahori, K. Kumazaki and D. Ryu,
2013 6 papers
Constraints on the multi-lognormal magnetic fields from the observations of the cosmic microwave background and the matter power spectrum
D. G. Yamazaki, K. Ichiki and K. Takahashi,
Type-I cosmic string network
T. Hiramatsu, Y. Sendouda, K. Takahashi, D. Yamauchi and C. Yoo,
Lower Bounds on Magnetic Fields in Intergalactic Voids from Long-Term GeV-TeV Light Curves of the Blazar Mrk 421
K. Takahashi, M. Mori, K. Ichiki, S. Inoue and H. Takami,
Possible existence of Ep-Lp and Ep-Eiso correlations for Short Gamma-Ray Bursts with a factor 5 to 100 dimmer than those for Long Gamma-Ray Bursts
R. Tsutsui, D. Yonetoku, T. Nakamura, K. Takahashi and Y. Morihara,
Femto-lensing due to a Cosmic String
C. Yoo, R. Saito, Y. Sendouda, K. Takahashi and D. Yamauchi,
Forecast constraints on cosmic strings from future CMB, pulsar timing and gravitational wave direct detection experiments
S. Kuroyanagi, K. Miyamoto, T. Sekiguchi, K. Takahashi and J. Silk,
2012 6 papers
Primordial magnetic fields with X-ray and S-Z cluster surveys
H. Tashiro, K. Takahashi and K. Ichiki,
Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments
S. Kuroyanagi, K. Miyamoto, T. Sekiguchi, K. Takahashi and J. Silk,
Stochastic Gravitational Wave Background originating from Halo Mergers
T. Inagaki, K. Takahashi and N. Sugiyama,
Weak lensing of CMB by cosmic (super-)strings
D. Yamauchi, K. Takahashi, Y. Sendouda and C. Yoo,
Constraint on the primordial vector mode and its magnetic field generation from seven-year Wilkinson Microwave Anisotropy Probe Observations
K. Ichiki, K. Takahashi and N. Sugiyama,
Lower Bounds on Intergalactic Magnetic Fields from Simultaneously Observed GeV-TeV Light Curves of the Blazar Mkn 501
K. Takahashi, M. Mori, K. Ichiki and S. Inoue,
2011 6 papers
Effects of Primordial Magnetic Field with Log-normal Distribution on Cosmic Microwave Background
D. G. Yamazaki, K. Ichiki and K. Takahashi,
Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era
S. Maeda, K. Takahashi and K. Ichiki,
Cosmic microwave background bispectrum of tensor passive modes induced from primordial magnetic fields
M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki and K. Takahashi,
Computation approach for CMB bispectrum from primordial magnetic fields
M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki and K. Takahashi,
CMB Bispectrum from Primordial Scalar, Vector and Tensor non-Gaussianities
M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki and K. Takahashi,
Probing Early Cosmic Magnetic Fields through Pair Echos from High-Redshift GRBs
K. Takahashi, S. Inoue, K. Ichiki and T. Nakamura,
2010 5 papers
Systematic Study of Gravitational Waves from Galaxy Merger
T. Inagaki, K. Takahashi, S. Masaki and N. Sugiyama,
CMB Bispectrum of Vector Modes Induced from Primordial Magnetic Fields
M. Shiraishi, D. Nitta, S. Yokoyama, K. Ichiki and K. Takahashi,
Analytic formulae of the CMB bispectra generated from non-Gaussianity in the tensor and vector perturbations
M. Shiraishi, S. Yokoyama, D. Nitta, K. Ichiki and K. Takahashi,
Analytical model for CMB temperature angular power spectrum from cosmic (super-)strings
D. Yamauchi, K. Takahashi, Y. Sendouda, C. Yoo and M. Sasaki,
Skewness in CMB temperature fluctuations from curved cosmic (super-)strings
D. Yamauchi, Y. Sendouda, C. Yoo, K. Takahashi, A. Naruko and M. Sasaki,
2009 4 papers
Non-Gaussianity in Cosmic Microwave Background Temperature Fluctuations from Cosmic (Super-)Strings
K. Takahashi, A. Naruko, Y. Sendouda, D. Yamauchi, C. Yoo and M. Sasaki,
Cosmological Constraints from calibrated Yonetoku and Amati relation implies Fundamental plane of Gamma-ray bursts
R. Tsutsui, T. Nakamura, D. Yonetoku, T. Murakami, Y. Kodama and K. Takahashi,
Possible Effects of Pair Echos on Gamma-Ray Burst Afterglow Emission
K. Murase, B. Zhang, K. Takahashi and S. Nagataki,
Constraints on $w_0$ and $w_a$ of Dark Energy from High Redshift Gamma Ray Bursts
R. Tsutsui, T. Nakamura, D. Yonetoku, T. Murakami, S. Tanabe, Y. Kodama and K. Takahashi,
2008 4 papers
Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields
K. Takahashi, K. Murase, K. Ichiki, S. Inoue and S. Nagataki,
Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars
K. Murase, K. Takahashi, S. Inoue, K. Ichiki and S. Nagataki,
Probing the Nature of the Weakest Intergalactic Magnetic Fields with the High Energy Emission of Gamma-Ray Bursts
K. Ichiki, S. Inoue and K. Takahashi,
Electromagnetic Properties of the Early Universe
K. Takahashi, K. Ichiki and N. Sugiyama,
2007 2 papers
Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
D. Baumann, K. Ichiki, P. J. Steinhardt and K. Takahashi,
Cosmological magnetic fields from nonlinear effects
T. Kobayashi, R. Maartens, T. Shiromizu and K. Takahashi,
2006 2 papers
Gravitational lensing of distant gamma-ray bursts mimics evolving dark energy
M. Oguri and K. Takahashi,
Cosmological Magnetic Field: A Fossil of Density Perturbations in the Early Universe
K. Ichiki, K. Takahashi, H. Ohno, H. Hanayama and N. Sugiyama,
2005 3 papers
Characterizing a cosmic string with the statistics of string lensing
M. Oguri and K. Takahashi,
Magnetic field generation from cosmological perturbations
K. Takahashi, K. Ichiki, H. Ohno and H. Hanayama,
Gravity is controlled by cosmological constant
Y. Iwashita, T. Shiromizu, K. Takahashi and S. Fujii,
2004 7 papers
Gravity in Randall-Sundrum two D-brane model
T. Shiromizu, K. Takahashi, Y. Himemoto and S. Yamamoto,
Acoustic causality in relativistic shells
S. Kinoshita, Y. Sendouda and K. Takahashi,
Asymmetric D-braneworld
K. Takahashi and T. Shiromizu,
WMAP Constraints on Decaying Cold Dark Matter
K. Ichiki, M. Oguri and K. Takahashi,
Sunyaev-Zel'dovich power spectrum with decaying cold dark matter
K. Takahashi, M. Oguri and K. Ichiki,
Cosmology and two-body problem of D-branes
K. Takahashi and K. Ichikawa,
D-braneworld cosmology II: Higher order corrections
T. Uesugi, T. Shiromizu, T. Torii and K. Takahashi,
2003 7 papers
Supernova Neutrinos, Neutrino Oscillations, and the Mass of the Progenitor Star
K. Takahashi, K. Sato, A. Burrows and T. A. Thompson,
Decaying Cold Dark Matter and the Evolution of the Cluster Abundance
M. Oguri, K. Takahashi, H. Ohno and K. Kotake,
Shock propagation and neutrino oscillation in supernova
K. Takahashi, K. Sato, H. E. Dalhed and J. R. Wilson,
Exactly solvable model for cosmological perturbations in dilatonic brane worlds
K. Koyama and K. Takahashi,
Effects of neutrino oscillation on supernova neutrino: inverted mass hierarchy
K. Takahashi and K. Sato,
Effective theory for close limit of two branes
T. Shiromizu, K. Koyama and K. Takahashi,
Primordial fluctuations in bulk inflaton model
K. Koyama and K. Takahashi,
2002 1 papers
Earth effects on supernova neutrinos and their implications for neutrino parameters
K. Takahashi and K. Sato,
2001 2 papers
Effects of Neutrino Oscillation on the Supernova Neutrino Spectrum
K. Takahashi, M. Watanabe, K. Sato and T. Totani,
The Earth Effects on the supernova neutrino spectra
K. Takahashi, M. Watanabe and K. Sato,
unpublished 9 papers
Detectability of CMB Weak Lensing and HI Cross Correlation and constraints on cosmological parameters
Shoichiro Tanaka, Shintaro Yoshiura, Kenji Kubota, Keitaro Takahashi, Atsushi J. Nishizawa, Naoshi Sugiyama,
Faraday Tomography with Sparse Modeling
Kazunori Akiyama, Takuya Akahori, Yoshimitsu Miyashita, Shinsuke Ideguchi, Ryosuke Yamaguchi, Shiro Ikeda and Keitaro Takahashi,
Gamma-Ray Bursts are precise distance indicators similar to Type Ia Supernovae?
R. Tsutsui, T. Nakamura, D. Yonetoku, K. Takahashi and Y. Morihara,
Generation of Seed Magnetic Fields in Primordial Supernova Remnants
H. Hanayama, K. Takahashi and K. Tomisaka,
Magnetic Field Spectrum at Cosmological Recombination
K. Ichiki, K. Takahashi, N. Sugiyama, H. Hanayama and H. Ohno,
An Analytic Model of Superclusters
M. Oguri, K. Takahashi, K. Ichiki, and H. Ohno,
Probing dark energy with gamma-ray bursts
K. Takahashi, M. Oguri, K. Kotake and H. Ohno,
The anisotropy of arrival directions of the cosmic rays around 10^{18} eV and VHE neutrinos
S. Nagataki and K. Takahashi,