LOFAR: The LOw-Frequency ARray
Artikel i vetenskaplig tidskrift, 2013
LOFAR, the LOw-Frequency ARray, is a new-generation radio interferometer constructed in the north of the Netherlands and across europe. Utilizing a novel phased-array design, LOFAR covers the largely unexplored low-frequency range from 10-240 MHz and provides a number of unique observing capabilities. Spreading out from a core located near the village of Exloo in the northeast of the Netherlands, a total of 40 LOFAR stations are nearing completion. A further five stations have been deployed throughout Germany, and one station has been built in each of France, Sweden, and the UK. Digital beam-forming techniques make the LOFAR system agile and allow for rapid repointing of the telescope as well as the potential for multiple simultaneous observations. With its dense core array and long interferometric baselines, LOFAR achieves unparalleled sensitivity and angular resolution in the low-frequency radio regime. The LOFAR facilities are jointly operated by the International LOFAR Telescope (ILT) foundation, as an observatory open to the global astronomical community. LOFAR is one of the first radio observatories to feature automated processing pipelines to deliver fully calibrated science products to its user community. LOFAR's new capabilities, techniques and modus operandi make it an important pathfinder for the Square Kilometre Array (SKA). We give an overview of the LOFAR instrument, its major hardware and software components, and the core science objectives that have driven its design. In addition, we present a selection of new results from the commissioning phase of this new radio observatory.
first stars
self-calibration
radio lines:
intergalactic medium
observations
reionization
instrumentation: interferometers
general
dark ages
interplanetary scintillation
telescopes
z-greater-than-5.7 quasars
understanding radio polarimetry
monte-carlo simulations
probe wmap
high-redshift
radio continuum: general
ray air-showers
digital sky survey
Författare
M. P. van Haarlem
M. W. Wise
A. W. Gunst
G. Heald
J. P. McKean
J. W. T. Hessels
A. G. de Bruyn
R. Nijboer
J. Swinbank
R. A. Fallows
M. Brentjens
A. Nelles
R. Beck
H. Falcke
R. Fender
J. Horandel
L. V. E. Koopmans
G. Mann
G. Miley
H. Rottgering
B. W. Stappers
Ramj Wijers
S. Zaroubi
M. van den Akker
A. Alexov
J. Anderson
K. Anderson
Arnold van Ardenne
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
M. Arts
A. Asgekar
I. M. Avruch
Fabien Batejat
Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik
L. Bahren
M. E. Bell
M. R. Bell
I. van Bemmel
P. Bennema
M. J. Bentum
G. Bernardi
P. Best
L. Birzan
A. Bonafede
A. J. Boonstra
R. Braun
J. Bregman
F. Breitling
R. H. van de Brink
J. Broderick
P. C. Broekema
W. N. Brouw
M. Brüggen
H. R. Butcher
W. van Cappellen
B. Ciardi
T. Coenen
John Conway
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
A. Coolen
A. Corstanje
S. Damstra
O. Davies
A. T. Deller
R. J. Dettmar
G. van Diepen
K. Dijkstra
P. Donker
A. Doorduin
J. Dromer
M. Drost
A. van Duin
J. Eisloffel
J. van Enst
C. Ferrari
W. Frieswijk
H. Gankema
M. A. Garrett
F. de Gasparin
M. Gerbers
E. de Geus
J. M. Griessmeier
T. Grit
P. Gruppen
J. P. Hamaker
T. Hassall
M. Hoeft
H. A. Holties
A. Horneffer
A. van der Horst
A. van Houwelingen
A. Huijgen
M. Iacobelli
H. Intema
N. Jackson
V. Jelic
A. de Jong
D. kant
A. Karastergiou
A. Koers
H. Kollen
V. I. Kondratiev
E. Kooistra
Y. Koopman
A. Koster
M. Kuniyoshi
M. Kramer
G. Kuper
P. Lambropoulos
C. Law
J. van Leeuwen
J. Lemaitre
M. Loose
P. Maat
G. Macario
S. Markoff
J. Masters
R. A. McFadden
D. McKay-Bukowski
H. Meijering
H. Meulman
M. Mevius
R. Millenaar
J. C. A. Miller-Jones
R. N. Mohan
J. D. Mol
J. Morawietz
R. Morganti
D. D. Mulcahy
E. Mulder
H. Munk
L. Nieuwenhuis
R. van Nieuwpoort
J. E. Noordam
M. Norden
A. Noutsos
A. R. Offringa
Hans Olofsson
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
A. Omar
E. Orru
R. Overeem
H. Paas
M. Pandey-Pommier
V. N. Pandey
R. Pizzo
A. Polatidis
D. Rafferty
S. Rawlings
W. Reich
J. P. de Reijer
J. Reitsma
G. A. Renting
P. Riemers
E. Rol
J. W. Romein
J. Roosjen
M. Ruiter
A. Scaife
K. van der Schaaf
B. Scheers
P. Schellart
A. Schoenmakers
G. Schoonderbeek
M. Serylak
A. Shulevski
J. Sluman
O. Smirnov
C. Sobey
H. Spreeuw
M. Steinmetz
C. G. M. Sterks
H. J. Stiepel
K. Stuurwold
M. Tagger
Y. Tang
C. Tasse
I. Thomas
S. Thoudam
M. C. Toribio
B. van der Tol
O. Usov
M. van Veelen
A. J. van der Veen
S. ter Veen
J. P. W. Verbiest
R. Vermeulen
N. Vermaas
C. Vocks
C. Vogt
M. de Vos
E. van der Wal
R. van Weeren
H. Weggemans
P. Weltevrede
S. White
S. J. Wijnholds
T. Wilhelmsson
O. Wucknitz
S. Yatawatta
P. Zarka
A. Zensus
J. van Zwieten
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 556 August article no. A2- A2Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1051/0004-6361/201220873