LOFAR calibration and wide-field imaging
Journal article, 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.

LOFAR

Interferometry

Imaging

Calibration

Author

C. Tasse

Observatoire de Paris-Meudon

G. van Diepen

Netherlands Institute for Radio Astronomy (ASTRON)

S. van der Tol

Leiden University

R. J. van Weeren

Leiden University

J. E. van Zwieten

Leiden University

Fabien Batejat

Chalmers, Earth and Space Sciences, Onsala Space Observatory

S. Bhatnagar

National Radio Astronomy Observatory Socorro

I. van Bemmel

Netherlands Institute for Radio Astronomy (ASTRON)

L. Birzan

Leiden University

A. Bonafede

Istituto di Radioastronomia

John Conway

Chalmers, Earth and Space Sciences, Onsala Space Observatory

C. Ferrari

Observatoire de la Cote d'Azur

F. De Gasperin

Max Planck Institute

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

Leiden University

E. Orru

University of Groningen

R. Pizzo

Netherlands Institute for Radio Astronomy (ASTRON)

D. Rafferty

Leiden University

U. Rau

National Radio Astronomy Observatory Socorro

H. Rottgering

Leiden University

A. Shulevski

University of Groningen

Comptes Rendus Physique

1631-0705 (ISSN)

Vol. 13 1 28-32

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.1016/j.crhy.2011.10.006

More information

Latest update

5/14/2018