S
Shiv K. Sethi
Researcher at Raman Research Institute
Publications - 99
Citations - 2730
Shiv K. Sethi is an academic researcher from Raman Research Institute. The author has contributed to research in topics: Redshift & Reionization. The author has an hindex of 28, co-authored 87 publications receiving 2400 citations. Previous affiliations of Shiv K. Sethi include Institut d'Astrophysique de Paris & Inter-University Centre for Astronomy and Astrophysics.
Papers
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Journal ArticleDOI
FIRST SEASON MWA EOR POWER SPECTRUM RESULTS at REDSHIFT 7
Adam P. Beardsley,Adam P. Beardsley,Bryna J. Hazelton,Ian Sullivan,P. Carroll,Nichole Barry,Masoud Rahimi,Bartosz Pindor,Cathryn M. Trott,J. L. B. Line,Daniel C. Jacobs,Miguel F. Morales,Jonathan C. Pober,Jonathan C. Pober,Gianni Bernardi,Gianni Bernardi,Judd D. Bowman,M. Busch,Frank H. Briggs,Roger J. Cappallo,B. E. Corey,A. de Oliveira-Costa,Joshua S. Dillon,Joshua S. Dillon,David Emrich,Aaron Ewall-Wice,Lu Feng,Bryan Gaensler,Bryan Gaensler,R. Goeke,Lincoln J. Greenhill,Jacqueline N. Hewitt,Natasha Hurley-Walker,Melanie Johnston-Hollitt,David L. Kaplan,Justin C. Kasper,Justin C. Kasper,Han-Seek Kim,E. Kratzenberg,Emil Lenc,Abraham Loeb,Colin J. Lonsdale,Mervyn J. Lynch,Benjamin McKinley,S. R. McWhirter,Daniel A. Mitchell,Edward H. Morgan,Abraham R. Neben,Nithyanandan Thyagarajan,Divya Oberoi,A. R. Offringa,Stephen M. Ord,S. Paul,T. Prabu,Pietro Procopio,J. Riding,Alan E. E. Rogers,A. Roshi,N. Udaya Shankar,Shiv K. Sethi,K. S. Srivani,Ravi Subrahmanyan,Max Tegmark,Steven Tingay,Mark Waterson,Mark Waterson,Randall B. Wayth,Rachel L. Webster,A. R. Whitney,Andrew Williams,Christopher L. Williams,Chen Wu,J. S. B. Wyithe +72 more
TL;DR: In this article, the authors introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods, and incorporate the new techniques into a deep integration of 32 hours of MWA data.
Journal ArticleDOI
Primordial magnetic fields in the post‐recombination era and early reionization
TL;DR: In this article, the authors explore the ways in which primordial magnetic fields influence the thermal and ionization history of the post-recombination Universe and show that the dissipation effects of magnetic fields, which redshifts to a present value B 0 = 3 x 10 -9 G smoothed on the magnetic Jeans scale and below, can give rise to Thomson scattering optical depths τ? 0.1.
Journal ArticleDOI
Foregrounds in Wide-Field Redshifted 21 cm Power Spectra
Nithyanandan Thyagarajan,Daniel C. Jacobs,Judd D. Bowman,Nichole Barry,Adam P. Beardsley,Gianni Bernardi,Gianni Bernardi,Frank H. Briggs,Roger J. Cappallo,P. Carroll,B. E. Corey,A. de Oliveira-Costa,Joshua S. Dillon,David Emrich,Aaron Ewall-Wice,Lu Feng,R. Goeke,Lincoln J. Greenhill,Bryna J. Hazelton,Jacqueline N. Hewitt,Natasha Hurley-Walker,Melanie Johnston-Hollitt,David L. Kaplan,Justin C. Kasper,Justin C. Kasper,Han-Seek Kim,Piyanat Kittiwisit,E. Kratzenberg,Emil Lenc,J. L. B. Line,Abraham Loeb,Colin J. Lonsdale,Mervyn J. Lynch,Benjamin McKinley,S. R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Edward H. Morgan,Abraham R. Neben,Divya Oberoi,A. R. Offringa,Stephen M. Ord,S. Paul,Bartosz Pindor,Jonathan C. Pober,T. Prabu,Pietro Procopio,J. Riding,Alan E. E. Rogers,A. Roshi,N. Udaya Shankar,Shiv K. Sethi,K. S. Srivani,Ravi Subrahmanyan,Ian Sullivan,Max Tegmark,Steven Tingay,Cathryn M. Trott,Mark Waterson,Mark Waterson,Randall B. Wayth,Rachel L. Webster,A. R. Whitney,Andrew Williams,Christopher L. Williams,Chen Wu,J. S. B. Wyithe +66 more
TL;DR: In this article, the authors investigate the signatures of wide-field measurements and an all-sky foreground model using the delay spectrum technique that maps the measurements to foreground object locations through signal delays between antenna pairs.
Journal ArticleDOI
The low-frequency environment of the Murchison Widefield Array : radio-frequency interference analysis and mitigation
A. R. Offringa,A. R. Offringa,Randall B. Wayth,Natasha Hurley-Walker,D. L. Kaplan,Nichole Barry,Adam P. Beardsley,Martin Bell,Gianni Bernardi,Gianni Bernardi,Judd D. Bowman,Frank H. Briggs,Joseph R. Callingham,Roger J. Cappallo,P. Carroll,Avinash A. Deshpande,Joshua S. Dillon,K. S. Dwarakanath,Aaron Ewall-Wice,Lu Feng,Bi-Qing For,Bryan Gaensler,Lincoln J. Greenhill,Paul Hancock,Bryna J. Hazelton,Jacqueline N. Hewitt,Luke Hindson,Daniel C. Jacobs,Melanie Johnston-Hollitt,Anna D. Kapińska,Han-Seek Kim,Piyanat Kittiwisit,Emil Lenc,J. L. B. Line,Abraham Loeb,Colin J. Lonsdale,Benjamin McKinley,Benjamin McKinley,S. R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Edward H. Morgan,John Morgan,Abraham R. Neben,Divya Oberoi,Stephen M. Ord,S. Paul,Bartosz Pindor,Jonathan C. Pober,T. Prabu,Pietro Procopio,J. Riding,N. Udaya Shankar,Shiv K. Sethi,K. S. Srivani,Lister Staveley-Smith,Ravi Subrahmanyan,Ian Sullivan,Max Tegmark,Nithyanandan Thyagarajan,Steven Tingay,Cathryn M. Trott,Rachel L. Webster,Anne M. Williams,Christopher L. Williams,Chen Wu,J. S. B. Wyithe,Qinghua Zheng +67 more
TL;DR: Offringa et al. as discussed by the authors studied the low-frequency environment of the Murchison Widefield Array (MWA) in terms of radio-frequency interference analysis and mitigation.
Journal ArticleDOI
The Murchison Widefield Array 21 cm Power Spectrum Analysis Methodology
Daniel C. Jacobs,Bryna J. Hazelton,Cathryn M. Trott,Joshua S. Dillon,Bartosz Pindor,Ian Sullivan,Jonathan C. Pober,Nichole Barry,Adam P. Beardsley,Adam P. Beardsley,Gianni Bernardi,Gianni Bernardi,Judd D. Bowman,Frank H. Briggs,Roger J. Cappallo,P. Carroll,B. E. Corey,A. de Oliveira-Costa,David Emrich,Aaron Ewall-Wice,Lu Feng,Bryan Gaensler,Bryan Gaensler,R. Goeke,Lincoln J. Greenhill,Jacqueline N. Hewitt,Natasha Hurley-Walker,Melanie Johnston-Hollitt,David L. Kaplan,David L. Kaplan,Justin C. Kasper,Justin C. Kasper,Han-Seek Kim,E. Kratzenberg,Emil Lenc,J. L. B. Line,Abraham Loeb,Colin J. Lonsdale,Mervyn J. Lynch,Benjamin McKinley,S. R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Edward H. Morgan,Abraham R. Neben,Nithyanandan Thyagarajan,Divya Oberoi,A. R. Offringa,Stephen M. Ord,S. Paul,T. Prabu,Pietro Procopio,J. Riding,Alan E. E. Rogers,A. Roshi,N. Udaya Shankar,Shiv K. Sethi,K. S. Srivani,Ravi Subrahmanyan,Max Tegmark,Steven Tingay,Mark Waterson,Mark Waterson,Randall B. Wayth,Rachel L. Webster,A. R. Whitney,Andrew Williams,Christopher L. Williams,Chen Wu,Chen Wu,J. S. B. Wyithe +70 more
TL;DR: In this paper, the authors compare the outputs of multiple data calibration and reduction pipelines for the purpose of validating statistical limits cosmological hydrogen at redshifts between 6 and 12.