Search Results - "Brackenhoff, S A"

Ionospheric contributions to the excess power in high-redshift 21-cm power-spectrum observations with LOFAR by Brackenhoff, S A, Mevius, M, Koopmans, L V E, Offringa, A, Ceccotti, E, Chege, J K, Gehlot, B K, Ghosh, S, Höfer, C, Mertens, F G, Munshi, S, Zaroubi, S

“…ABSTRACT The turbulent ionosphere causes phase shifts to incoming radio waves on a broad range of temporal and spatial scales. When an interferometer is not…”
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A novel radio imaging method for physical spectral index modelling by Ceccotti, E, Offringa, A R, Koopmans, L V E, Timmerman, R, Brackenhoff, S A, Gehlot, B K, Mertens, F G, Munshi, S, Pandey, V N, van Weeren, R J, Yatawatta, S, Zaroubi, S

“…ABSTRACT We present a new method, called ‘forced-spectrum fitting’, for physically based spectral modelling of radio sources during deconvolution. This…”
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Assessing the impact of two independent direction-dependent calibration algorithms on the LOFAR 21-cm signal power spectrum by Gan, H, Mertens, F. G, Koopmans, L. V. E, Offringa, A. R, Mevius, M, Pandey, V. N, Brackenhoff, S. A, Ceccotti, E, Ciardi, B, Gehlot, B. K, Ghara, R, Giri, S. K, Iliev, I. T, Munshi, S

“…A&A 669, A20 (2023) Detecting the 21-cm signal from the Epoch of Reionisation (EoR) is challenging due to the strong astrophysical foregrounds, ionospheric…”
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Ionospheric contributions to the excess power in high-redshift 21-cm power-spectrum observations with LOFAR by Brackenhoff, S. A, Mevius, M, Koopmans, L. V. E, Offringa, A, Ceccotti, E, Chege, J. K, Gehlot, B. K, Ghosh, S, Höfer, C, Mertens, F. G, Munshi, S, Zaroubi, S

“…The turbulent ionosphere causes phase shifts to incoming radio waves on a broad range of temporal and spatial scales. When an interferometer is not…”
Get full text

A novel radio imaging method for physical spectral index modelling by Ceccotti, E, Offringa, A. R, Koopmans, L. V. E, Timmerman, R, Brackenhoff, S. A, Gehlot, B. K, Mertens, F. G, Munshi, S, Pandey, V. N, van Weeren, R. J, Yatawatta, S, Zaroubi, S

“…We present a new method, called "forced-spectrum fitting", for physically-based spectral modelling of radio sources during deconvolution. This improves upon…”
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First upper limits on the 21 cm signal power spectrum from cosmic dawn from one night of observations with NenuFAR by Munshi, S, Mertens, F. G, Koopmans, L. V. E, Offringa, A. R, Semelin, B, Aubert, D, Barkana, R, Bracco, A, Brackenhoff, S. A, Cecconi, B, Ceccotti, E, Corbel, S, Fialkov, A, Gehlot, B. K, Ghara, R, Girard, J. N, Grießmeier, J. M, Höfer, C, Hothi, I, Mériot, R, Mevius, M, Ocvirk, P, Shaw, A. K, Theureau, G, Yatawatta, S, Zarka, P, Zaroubi, S

“…A&A 681, A62 (2024) The redshifted 21 cm signal from neutral hydrogen is a direct probe of the physics of the early universe and has been an important science…”
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The impact of lossy data compression on the power spectrum of the high redshift 21-cm signal with LOFAR by Chege, J. K, Koopmans, L. V. E, Offringa, A. R, Gehlot, B. K, Brackenhoff, S. A, Ceccotti, E, Ghosh, S, Höfer, C, Mertens, F. G, Mevius, M, Munshi, S

“…Current radio interferometers output multi-petabyte-scale volumes of data per year making the storage, transfer, and processing of this data a sizeable…”
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Beyond the horizon: Quantifying the full sky foreground wedge in the cylindrical power spectrum by Munshi, S, Mertens, F. G, Koopmans, L. V. E, Offringa, A. R, Ceccotti, E, Brackenhoff, S. A, Chege, J. K, Gehlot, B. K, Ghosh, S, Höfer, C, Mevius, M

“…One of the main obstacles preventing the detection of the redshifted 21-cm signal from neutral hydrogen in the early Universe is the astrophysical foreground…”
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Transient RFI environment of LOFAR-LBA at 72-75 MHz: Impact on ultra-widefield AARTFAAC Cosmic Explorer observations of the redshifted 21-cm signal by Gehlot, B. K, Koopmans, L. V. E, Brackenhoff, S. A, Ceccotti, E, Ghosh, S, Höfer, C, Mertens, F. G, Mevius, M, Munshi, S, Offringa, A. R, Pandey, V. N, Rowlinson, A, Shulevski, A, Wijers, R. A. M. J, Yatawatta, S, Zaroubi, S

“…A&A 681, A71 (2024) Measurement of the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn (CD) and Epoch of Reionisation (EoR) promises to unveil…”
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