Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Peter H Sims"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:4443-4455
We present a comprehensive simulation-based study of the BayesEoR code for 21 cm power spectrum recovery when analytically marginalizing over foreground parameters. To account for covariance between the 21 cm signal and contaminating foreground emiss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4aae39225b32f2de41574c05ae511e1
https://doi.org/10.1093/mnras/stad401
https://doi.org/10.1093/mnras/stad401
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 517:910-934
High-fidelity radio interferometric data calibration that minimizes spurious spectral structure in the calibrated data is essential in astrophysical applications, such as 21 cm cosmology, which rely on knowledge of the relative spectral smoothness of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22dd42ea12fe08ceaf07daa9ed252c1b
https://doi.org/10.1093/mnras/stac1861
https://doi.org/10.1093/mnras/stac1861
Autor:
Alan E. E. Rogers, John P. Barrett, Judd D. Bowman, Rigel Cappallo, Colin J. Lonsdale, Nivedita Mahesh, Raul A. Monsalve, Steven G. Murray, Peter H. Sims
Scattering from objects near an antenna produce correlated signals from strong compact radio sources in a manner similar to those used by the Sea Interferometer to measure the radio source positions using the fine frequency structure in the total pow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0aff9c7dc988d1d22c024f613a5947d7
http://arxiv.org/abs/2212.04526
http://arxiv.org/abs/2212.04526
In a companion paper, we presented bayescal, a mathematical formalism for mitigating sky-model incompleteness in interferometric calibration. In this paper, we demonstrate the use of bayescal to calibrate the degenerate gain parameters of full-Stokes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5284100518bc586739cb29645ed618a2
http://arxiv.org/abs/2206.13553
http://arxiv.org/abs/2206.13553
Autor:
Peter H Sims, Judd D Bowman, Nivedita Mahesh, Steven G Murray, John P Barrett, Rigel Cappallo, Raul A Monsalve, Alan E E Rogers, Titu Samson, Akshatha K Vydula
Accurately accounting for spectral structure in spectrometer data induced by instrumental chromaticity on scales relevant for detection of the 21-cm signal is among the most significant challenges in global 21-cm signal analysis. In the publicly avai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fbf32cdf64376822d518500e08a5aef
Autor:
Steven G Murray, Judd D Bowman, Peter H Sims, Nivedita Mahesh, Alan E E Rogers, Raul A Monsalve, Titu Samson, Akshatha Konakondula Vydula
We develop a Bayesian model that jointly constrains receiver calibration, foregrounds and cosmic 21cm signal for the EDGES global 21\,cm experiment. This model simultaneously describes calibration data taken in the lab along with sky-data taken with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3477292c323e34a2eff61d142a3cf760