LOFAR calibration and wide-field imaging
Övrig text i vetenskaplig tidskrift, 2012
LOFAR is a revolutionary instrument, operating at low frequencies (nu less than or similar to 240 MHz). It will drive major breakthroughs in the area of observational cosmology, but its use requires the development of challenging techniques and algorithms. Since its field of view and sensitivity are increased by orders of magnitude as compared to the older generation of instruments, new technical problems have to be addressed. The LOFAR survey team is in charge of commissioning the first LOFAR data produced in the imager mode as part of building the imaging pipeline. We are developing algorithms to tackle the problems associated with calibration (ionosphere, beam, etc.) and wide-field imaging for the achievement of the deep extragalactic surveys. New types of problems arise in that context, and notions such as algorithmic complexity and parallelism become fundamental.
Calibration
Interferometry
Imaging
LOFAR
Författare
C. Tasse
Observatoire de Paris-Meudon
G. van Diepen
Netherlands Institute for Radio Astronomy (ASTRON)
S. van der Tol
Universiteit Leiden
R. J. van Weeren
Universiteit Leiden
J. E. van Zwieten
Universiteit Leiden
Fabien Batejat
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
S. Bhatnagar
National Radio Astronomy Observatory Socorro
I. van Bemmel
Netherlands Institute for Radio Astronomy (ASTRON)
L. Birzan
Universiteit Leiden
A. Bonafede
Istituto di Radioastronomia
John Conway
Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium
C. Ferrari
Observatoire de la Cote d'Azur
F. De Gasperin
Max-Planck-Gesellschaft
K. Golap
National Radio Astronomy Observatory Socorro
G. Heald
Netherlands Institute for Radio Astronomy (ASTRON)
N. Jackson
University of Manchester
G. Macario
Observatoire de la Cote d'Azur
J. McKean
Netherlands Institute for Radio Astronomy (ASTRON)
N. R. Mohan
Universiteit Leiden
E. Orru
Rijksuniversiteit Groningen
R. Pizzo
Netherlands Institute for Radio Astronomy (ASTRON)
D. Rafferty
Universiteit Leiden
U. Rau
National Radio Astronomy Observatory Socorro
H. Rottgering
Universiteit Leiden
A. Shulevski
Rijksuniversiteit Groningen
Comptes Rendus Physique
1631-0705 (ISSN) 18781535 (eISSN)
Vol. 13 1 28-32Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1016/j.crhy.2011.10.006