Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Panagiotis Labropoulos"'
Autor:
Léon V. E. Koopmans, Saleem Zaroubi, Vibor Jelić, Panagiotis Labropoulos, Filipe B. Abdalla, Emma Chapman, Geraint Harker, Michiel A. Brentjens, de Antonius Bruyn
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 423:2518-2532
We introduce a new implementation of the FastICA algorithm on simulated LOFAR EoR data with the aim of accurately removing the foregrounds and extracting the 21-cm reionization signal. We find that the method successfully removes the foregrounds with
Autor:
Vibor Jelić, Gianni Bernardi, de Antonius Bruyn, Saleem Zaroubi, Léon V. E. Koopmans, Panagiotis Labropoulos
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 409:1647-1659
Experiments designed to measure the redshifted 21~cm line from the Epoch of Reionization (EoR) are challenged by strong astrophysical foreground contamination, ionospheric distortions, complex instrumental response and other different types of noise
Autor:
M. A. Garrett, Vibor Jelić, Michel Tagger, B. Ciardi, Aris Karastergiou, Harish Vedantham, Marco Iacobelli, Michael W. Wise, Gianni Bernardi, Garrelt Mellema, F. Breitling, F. B. Abdalla, Panagiotis Labropoulos, H. Paas, R. J. van Weeren, Richard Fallows, Léon V. E. Koopmans, M. Kuniyoshi, Michiel A. Brentjens, W. N. Brouw, R. Nijboer, E. Juette, Emanuela Orru, Olaf Wucknitz, V. Veligatla, Gottfried Mann, Ben Stappers, John McKean, M. Mevius, A. G. Polatidis, J. M. Anderson, A. Alexov, Gerard H. Kuper, J. D. Mol, S. ter Veen, Annalisa Bonafede, R. Pizzo, A. W. Gunst, T. E. Hassall, M. Pandey-Pommier, Ph. Zarka, Joop Schaye, Geraint Harker, Michael Kramer, J. Sluman, P. Maat, Jason W. T. Hessels, M. J. Norden, H. J. A. Röttgering, A. R. Offringa, Philip Best, V. I. Kondratiev, Heino Falcke, V. N. Pandey, Chiara Ferrari, J. Noordam, S. Duscha, E. de Geus, John Conway, R. Vermeulen, Sarod Yatawatta, S. Kazemi, Matthias Hoeft, S. Daiboo, F. Batejat, Michael R. Bell, Wolfgang Reich, Saleem Zaroubi, J. M. Griessmeier, R. H. van de Brink, Rajat M. Thomas, Cyril Tasse, Y. Tang, J. W. Broderick, Emma Chapman, Mark J. Bentum, Stefan J. Wijnholds, J. van Leeuwen, Joel N. Bregman, H. Munk, Marcus Brüggen, F. de Gasperin, W. Frieswijk, I. M. Avruch, Oleg Smirnov, Matthias Steinmetz, Martin Bell, O. Martinez Rubi, de Antonius Bruyn
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 550, pp.A136. ⟨10.1051/0004-6361/201220874⟩
Astronomy & astrophysics, 550(A136), 1-19. EDP Sciences
Astronomy & Astrophysics, 550, A136
Astronomy & Astrophysics, 550
Astronomy & Astrophysics, 550. EDP Sciences
Astronomy and Astrophysics-A&A, 2013, 550, pp.A136. ⟨10.1051/0004-6361/201220874⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 550, pp.A136. ⟨10.1051/0004-6361/201220874⟩
Astronomy & astrophysics, 550(A136), 1-19. EDP Sciences
Astronomy & Astrophysics, 550, A136
Astronomy & Astrophysics, 550
Astronomy & Astrophysics, 550. EDP Sciences
Astronomy and Astrophysics-A&A, 2013, 550, pp.A136. ⟨10.1051/0004-6361/201220874⟩
The aim of the LOFAR Epoch of Reionization (EoR) project is to detect the spectral fluctuations of the redshifted HI 21cm signal. This signal is weaker by several orders of magnitude than the astrophysical foreground signals and hence, in order to ac
Autor:
R.-J. Dettmar, Steve Rawlings, Vibor Jelić, Benedetta Ciardi, Ben Stappers, Aris Karastergiou, Y. Tang, R. Pizzo, V. N. Pandey, A. Alexov, Michael W. Wise, Gianni Bernardi, J. Eisloeffel, J. Sluman, W. A. van Cappellen, Panagiotis Labropoulos, Garrelt Mellema, A. Schoenmakers, M. Mevius, John Conway, P. Maat, M. P. van Haarlem, Rainer Beck, G. van Diepen, M. J. Norden, Heino Falcke, A. W. Gunst, Sarod Yatawatta, R. Nijboer, V. Veligatla, Joop Schaye, J. M. Anderson, D. A. Rafferty, S. Daiboo, M. Kuniyoshi, Michael R. Bell, A. G. Polatidis, A. van Duin, H. Paas, Harish Vedantham, A. G. de Bruyn, V. I. Kondratiev, H. Meulman, A. van Ardenne, Harvey Butcher, J. D. Mol, Laura Birzan, M. Pandey, Michel Tagger, Michiel A. Brentjens, M. Gerbers, Jason W. T. Hessels, George Heald, Matthias Steinmetz, Rob Fender, Marcus Brüggen, Annalisa Bonafede, Gottfried Mann, Mark J. Bentum, Saleem Zaroubi, J. Noordam, Charlotte Sobey, John McKean, John D. Swinbank, Olaf Wucknitz, Gerard H. Kuper, Stefan J. Wijnholds, O. Martinez-Ruby, Léon V. E. Koopmans, Ph. Zarka, Philip Best, Ashish Asgekar, Y. Koopman, R. Vermeulen, A. R. Offringa, R. J. van Weeren, Matthias Hoeft, A. Horneffer, Huub Röttgering, M. Avruch, T. E. Hassall, Martin Bell, J. M. Griessmeier, Geraint Harker, M. de Vos, Ralph A. M. J. Wijers, Christian Vocks, W. Frieswijk, Wolfgang Reich, Oleg Smirnov, Cyril Tasse, J. W. Broderick, F. Breitling, S. Kazemi, J. van Leeuwen
Publikováno v:
Astronomy & Astrophysics, 549
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 549, 15 p. ⟨10.1051/0004-6361/201220293⟩
Astronomy & astrophysics, 549:A11. EDP Sciences
Astronomy & Astrophysics, 549, A11
Astronomy & astrophysics, 549:A11, 1-16. EDP Sciences
Astronomy & Astrophysics, 549. EDP Sciences
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 549, 15 p. ⟨10.1051/0004-6361/201220293⟩
Astronomy & astrophysics, 549:A11. EDP Sciences
Astronomy & Astrophysics, 549, A11
Astronomy & astrophysics, 549:A11, 1-16. EDP Sciences
Astronomy & Astrophysics, 549. EDP Sciences
Aims: This paper discusses the spectral occupancy for performing radio astronomy with the Low-Frequency Array (LOFAR), with a focus on imaging observations. Methods: We have analysed the radio-frequency interference (RFI) situation in two 24-h survey
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc58181acd964756072941ccc36aa20c
http://hdl.handle.net/2066/111267
http://hdl.handle.net/2066/111267
Autor:
A. G. de Bruyn, Vibor Jelić, Sarod Yatawatta, Gianni Bernardi, Garrelt Mellema, Andreas H. Pawlik, Geraint Harker, Joop Schaye, Panagiotis Labropoulos, Léon V. E. Koopmans, Michiel A. Brentjens, Saleem Zaroubi, Rajat M. Thomas, V. N. Pandey, Benedetta Ciardi, A. R. Offringa
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
One of the aims of the Low Frequency Array (LOFAR) Epoch of Reionization (EoR) project is to measure the power spectrum of variations in the intensity of redshifted 21-cm radiation from the EoR. The sensitivity with which this power spectrum can be e
Autor:
Léon V. E. Koopmans, Panagiotis Labropoulos, Joop Schaye, Geraint Harker, Ilian T. Iliev, A. G. de Bruyn, Sarod Yatawatta, Saleem Zaroubi, Rajat M. Thomas, Vibor Jelić, Gianni Bernardi, Garrelt Mellema, Andreas H. Pawlik, Benedetta Ciardi, Michiel A. Brentjens, V. N. Pandey
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 393(4), 1449-1458. Oxford University Press
Detecting redshifted 21cm emission from neutral hydrogen in the early Universe promises to give direct constraints on the epoch of reionization (EoR). It will, though, be very challenging to extract the cosmological signal (CS) from foregrounds and n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a66794d5e410563f44f48468eb5e421c
http://sro.sussex.ac.uk/id/eprint/18599/1/MNRAS-2009-Harker-1449-58.pdf
http://sro.sussex.ac.uk/id/eprint/18599/1/MNRAS-2009-Harker-1449-58.pdf
Autor:
Michiel A. Brentjens, Sarod Yatawatta, Benedetta Ciardi, Vibor Jelić, A. R. Offringa, Gianni Bernardi, V. N. Pandey, Joop Schaye, de Antonius Bruyn, Léon V. E. Koopmans, Panagiotis Labropoulos, Geraint Harker, Saleem Zaroubi, Rajat M. Thomas
Publikováno v:
Astronomy & astrophysics, 500(3), 965-979. EDP Sciences
We present the first results from a series of observations conducted with the Westerbork telescope in the 140--160 MHz range with a 2 arcmin resolution aimed at characterizing the properties of the foregrounds for epoch of reionization experiments. F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b5903d4ac3232e6543b4e224b27beaf
https://www.bib.irb.hr/766586
https://www.bib.irb.hr/766586
Autor:
Michiel A. Brentjens, Geraint Harker, Vibor Jelić, Sarod Yatawatta, Gianni Bernardi, Garrelt Mellema, Vishambhar Pandey, Saleem Zaroubi, Rajat M. Thomas, Léon V. E. Koopmans, Panagiotis Labropoulos, Benedetta Ciardi, A. G. de Bruyn, Joop Schaye, A. R. Offringa
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 397(2), 1138-1152. Oxford University Press
An obstacle to the detection of redshifted 21cm emission from the epoch of reionization (EoR) is the presence of foregrounds which exceed the cosmological signal in intensity by orders of magnitude. We argue that in principle it would be better to fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8accc41822fcdd263d0d604b824ae22a
Autor:
Panagiotis Labropoulos, Vishambhar Pandey, Michiel A. Brentjens, Léon V. E. Koopmans, Sarod Yatawatta, Ger de Bruyn, Benedetta Ciardi, Vibor Jelić, Gianni Bernardi, Joop Schaye, Saleem Zaroubi, Rajat M. Thomas, Geraint Harker
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 389(3), 1319-1335. Oxford University Press
Future high redshift 21-cm experiments will suffer from a high degree of contamination, due both to astrophysical foregrounds and to non-astrophysical and instrumental effects. In order to reliably extract the cosmological signal from the observed da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73c732ed18607b007a03fe43c961d60d
Autor:
Dimitra Kavatha, Styliani Sybardi, Athina Savva, Maria Raftogiannis, Dionyssia-Pinelopi Carrer, Panagiotis Gargalianos, Ioannis Pavleas, Maria Theodorakopoulou, Chrisostomos Katsenos, Labrini Galani, Aggelos Economou, Marianna Georgitsi, Panagiotis Labropoulos, Efterpi Apostolidou, George Efthymiou, Konstantinos Pontikis, Evangelos Koratzanis, Evangelos J. Giamarellos-Bourboulis, Michael Paraschos, Nicolaos Antonakos, Malvina Lada, George Panoutsopoulos, George Nakos, Christina Trakatelli, Helen Giamarellou, Charalambos Gogos, Athanassios Prekates, Apostolos Armaganidis, Panagiotis Tsiaoussis, George Dimopoulos, Garyfallia Poulakou, Ilias Karaiskos, N. Galanakis, Michael Meisner, Evgenia Paggalou, Antonia-Panagiota Georgopoulou
Publikováno v:
Journal of Critical Care. 26:331.e1-331.e7
PURPOSE: The objective of this study is to define if early changes of procalcitonin (PCT) may inform about prognosis and appropriateness of administered therapy in sepsis. METHODS: A prospective multicenter observational study was conducted in 289 pa