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LOFAR calibration and wide-field imaging

C. Tasse ; G. van Diepen ; S. van der Tol ; R. J. van Weeren ; J. E. van Zwieten ; Fabien Batejat (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; S. Bhatnagar ; I. van Bemmel ; L. Birzan ; A. Bonafede ; John Conway (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; C. Ferrari ; F. De Gasperin ; K. Golap ; G. Heald ; N. Jackson ; G. Macario ; J. McKean ; N. Mohan ; E. Orru ; R. Pizzo ; D. Rafferty ; U. Rau ; H. Rottgering ; A. Shulevski
Comptes Rendus Physique (1631-0705). Vol. 13 (2012), 1, p. 28-32.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: LOFAR, Interferometry, Calibration, Imaging

Denna post skapades 2012-02-23. Senast ändrad 2014-09-02.
CPL Pubid: 155370


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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)


Astronomi, astrofysik och kosmologi

Chalmers infrastruktur