Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR
ABSTRACT A new upper limit on the 21 cm signal power spectrum at a redshift of z≈ 9.1 is
presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The …
presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The …
Upper limits on the 21 cm epoch of reionization power spectrum from one night with LOFAR
AH Patil, S Yatawatta, LVE Koopmans… - The Astrophysical …, 2017 - iopscience.iop.org
We present the first limits on the Epoch of Reionization 21 cm H i power spectra, in the
redshift range z= 7.9–10.6, using the Low-Frequency Array (LOFAR) High-Band Antenna …
redshift range z= 7.9–10.6, using the Low-Frequency Array (LOFAR) High-Band Antenna …
LOFAR facet calibration
RJ Van Weeren, WL Williams… - The Astrophysical …, 2016 - iopscience.iop.org
ABSTRACT LOFAR, the Low-Frequency Array, is a powerful new radio telescope operating
between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the …
between 10 and 240 MHz. LOFAR allows detailed sensitive high-resolution studies of the …
The first power spectrum limit on the 21-cm signal of neutral hydrogen during the Cosmic Dawn at z = 20–25 from LOFAR
Observations of the redshifted 21-cm hyperfine line of neutral hydrogen from early phases of
the Universe such as Cosmic Dawn and the Epoch of Reionization promise to open a new …
the Universe such as Cosmic Dawn and the Epoch of Reionization promise to open a new …
CHIPS: The Cosmological H i Power Spectrum Estimator
Detection of the cosmological neutral hydrogen signal from the Epoch of Reionization (EoR)
and estimation of its basic physical parameters are principal scientific aims of many current …
and estimation of its basic physical parameters are principal scientific aims of many current …
First upper limits on the 21 cm signal power spectrum from cosmic dawn from one night of observations with NenuFAR
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 driver of many present and upcoming …
early universe and has been an important science driver of many present and upcoming …
The impact of modelling errors on interferometer calibration for 21 cm power spectra
We study the impact of sky-based calibration errors from source mismodelling on 21 cm
power spectrum measurements with an interferometer and propose a method for …
power spectrum measurements with an interferometer and propose a method for …
Initial LOFAR observations of epoch of reionization windows-II. Diffuse polarized emission in the ELAIS-N1 field
Aims. This study aims to characterise the polarized foreground emission in the ELAIS-N1
field and to address its possible implications for extracting of the cosmological 21 cm signal …
field and to address its possible implications for extracting of the cosmological 21 cm signal …
Systematic biases in low-frequency radio interferometric data due to calibration: the LOFAR-EoR case
AH Patil, S Yatawatta, S Zaroubi… - Monthly Notices of …, 2016 - academic.oup.com
The redshifted 21 cm line of neutral hydrogen is a promising probe of the epoch of
reionization (EoR). However, its detection requires a thorough understanding and control of …
reionization (EoR). However, its detection requires a thorough understanding and control of …
[HTML][HTML] Linear polarization structures in LOFAR observations of the interstellar medium in the 3C 196 field
Aims. This study aims to characterize linear polarization structures in LOFAR observations of
the interstellar medium (ISM) in the 3C 196 field, one of the primary fields of the LOFAR …
the interstellar medium (ISM) in the 3C 196 field, one of the primary fields of the LOFAR …