LOFAR calibration and wide-field imaging

被引：11

作者：

Tasse, Cyril ^{[1
]}

van Diepen, Ger ^{[2
]}

van der Tol, Sebastiaan ^{[3
]}

van Weeren, Reinout J. ^{[3
]}

van Zwieten, Joris E. ^{[3
]}

Batejat, Fabien ^{[4
]}

Bhatnagar, Sanjay ^{[5
]}

van Bemmel, Ilse ^{[2
]}

Birzan, Laura ^{[3
]}

Bonafede, Annalisa ^{[6
]}

Conway, John ^{[4
]}

Ferrari, Chiara ^{[7
]}

De Gasperin, Francesco ^{[8
]}

Golap, Kumar ^{[5
]}

Heald, George ^{[2
]}

Jackson, Neal ^{[9
]}

Macario, Giulia ^{[7
]}

McKean, John ^{[2
]}

Mohan, Niruj ^{[3
]}

Orru, Emanuela ^{[10
]}

Pizzo, Roberto ^{[2
]}

Rafferty, David ^{[3
]}

Rau, Urvashi ^{[5
]}

Rottgering, Huub ^{[3
]}

Shulevski, Aleksandar ^{[10
]}

机构：

[1] Observ Paris, GEPI, F-92190 Meudon, France

[2] ASTRON, NL-7990 AA Dwingeloo, Netherlands

[3] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[4] Chalmers, Onsala Space Observ, S-43992 Onsala, Sweden

[5] Natl Radio Astron Observ, Socorro, NM 87801 USA

[6] INAF, Ist Radioastron, I-40129 Bologna, Italy

[7] Observ Cote Azur, CNRS UMR Cassiopee 6202, UNS, F-06300 Nice, France

[8] Max Planck Inst Astrophys, D-85741 Garching, Germany

[9] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England

[10] Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands

来源：

COMPTES RENDUS PHYSIQUE | 2012年 / 13卷 / 01期

关键词：

LOFAR; Interferometry; Calibration; Imaging;

D O I：

10.1016/j.crhy.2011.10.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

引用

页码：28 / 32

页数：5

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