Initial deep LOFAR observations of epoch of reionization windows. I. The north celestial pole

@article{Yatawatta2013InitialDL,
  title={Initial deep LOFAR observations of epoch of reionization windows. I. The north celestial pole},
  author={Sarod Yatawatta and A. G. de Bruyn and Michiel Brentjens and Panagiotis Labropoulos and V. N. Pandey and Sanaz Kazemi and Saleem Zaroubi and L{\'e}on V. E. Koopmans and Andr{\'e} R. Offringa and Vibor Jeli{\'c} and O. Martinez Rubi and V. K. Veligatla and Stefan J. Wijnholds and Willem Brouw and Gianni Bernardi and Benedetta Ciardi and Soobash Daiboo and Geraint J. A. Harker and Garrelt Mellema and Joop Schaye and R. M. C. Thomas and Harish K. Vedantham and Emma Chapman and Filipe B. Abdalla and Anastasia Alexov and J. Anderson and I. M. Avruch and Fabien Batejat and Martin E. Bell and Michael R. Bell and M. J. Bentum and Philip N. Best and Annalisa Bonafede and Jaap D. Bregman and Frank Breitling and R. H. van de Brink and Jess W. Broderick and Marcus Bruggen and J. Conway and F. de Gasperin and Eug{\'e}ne J. De Geus and Sven Duscha and Heino Falcke and Richard A. Fallows and Christophe Ferrari and Wilfred W.F. Frieswijk and Michael A. Garrett and Jean-Mathias Grie{\ss}meier and Andre W. Gunst and T. E. Hassall and Jason W. T. Hessels and M. Hoeft and Marco Iacobelli and Eva Juette and Aris Karastergiou and Vladislav I. Kondratiev and Michael Kramer and Masaya Kuniyoshi and Gerard H. Kuper and Joeri van Leeuwen and Peter Maat and Gottfried Mann and J. P. McKean and Maaijke Mevius and Jan David Mol and H. Munk and Ronald Nijboer and Jan E. Noordam and Menno Norden and Emanuela Orr̀u and H. J. Paas and Mamta Pandey-Pommier and R F Pizzo and A. G. Polatidis and Wolfgang Reich and H. J. A. Rottgering and J. Sluman and Oleg M. Smirnov and Ben W. Stappers and Matthias Steinmetz and Michel Tagger and Y. Tang and Cyril Tasse and Sander ter Veen and Ren{\'e} C. Vermeulen and R. J. van Weeren and Michael W. Wise and Olaf Wucknitz and Philippe Zarka},
  journal={Astronomy and Astrophysics},
  year={2013},
  volume={550},
  pages={1-17}
}
Aims. The aim of the LOFAR epoch of reionization (EoR) project is to detect the spectral fluctuations of the redshifted HI 21 cm signal. This signal is weaker by several orders of magnitude than the astrophysical foreground signals and hence, in order to achieve this, very long integrations, accurate calibration for stations and ionosphere and reliable foreground removal are essential. Methods. One of the prospective observing windows for the LOFAR EoR project will be centered at the north… Expand
Constraining the epoch of reionization with the variance statistic
The Epoch of Reionization (EoR) is the epoch in which most of the neutral gas in the Universe was re-ionized by the radiation from the first stars and galaxies. Many projects are underway to detectExpand
Constraining the epoch of reionization with the variance statistic
  • A. H. Patil
  • Physics
  • 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS)
  • 2014
The Epoch of Reionization (EoR) is the epoch in which most of the neutral gas in the Universe was re-ionized by the radiation from the first stars and galaxies. Many projects are underway to detectExpand
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We have conducted a deep survey (with a central rms of 55 μJy) with the LOw Frequency ARray (LOFAR) at 120–168 MHz of the Boötes field, with an angular resolution of 3.98″ × 6.45″, and obtained aExpand
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We present observations of the XMM Large-Scale Structure (XMM-LSS) field observed with the LOw Frequency ARray (LOFAR) at 120–168 MHz. Centred at a J2000 declination of −4.5°, this is a challengingExpand
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We present a catalog of 624 radio sources detected around the North Celestial Pole (NCP) with the 21 Centimeter Array (21CMA), a radio interferometer dedicated to the statistical measurement of theExpand
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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 (HBA). In total, 13.0 hrExpand
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The Square Kilometre Array (SKA) will be the first low-frequency instrument with the capability to directly image the structures of the Epoch of Reionization (EoR). Indeed, deep imaging of the EoRExpand
Improving the Epoch of Reionization Power Spectrum Results from Murchison Widefield Array Season 1 Observations
Measurements of 21 cm Epoch of Reionization (EoR) structure are subject to systematics originating from both the analysis and the observation conditions. Using 2013 data from the Murchison WidefieldExpand
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The Square Kilometre Array (SKA) is a planned radio interferometer of unprecedented scale that will revolutionize low-frequency radio astronomy when completed. In particular, one of its core scienceExpand
Precision requirements for interferometric gridding in the analysis of a 21 cm power spectrum
TLDR
Among the tested methods, image domain gridding shows the highest accuracy with the lowest imaging time, and convolutional gridding with tuned parameters results in sufficient accuracy, overall the most suitable algorithm for 21-cm EoR experiments, including for future SKA EeR analyses. Expand
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