Lucky imaging: high angular resolution imaging in the visible from the ground

被引：204

作者：

Law, NM ^{[1
]}

Mackay, CD ^{[1
]}

Baldwin, JE ^{[1
]}

机构：

[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

ASTRONOMY & ASTROPHYSICS | 2006年 / 446卷 / 02期

关键词：

instrumentation : high angular resolution; techniques : high angular resolution; techniques : image processing; atmospheric effects;

D O I：

10.1051/0004-6361:20053695

中图分类号：

P1 [天文学];

学科分类号：

0704 [天文学];

摘要：

We use a Lucky Imaging system to obtain I-band images with much improved angular resolution on a 2.5 m telescope. We present results from a 10-night assessment campaign on the 2.56 m Nordic Optical Telescope and quantify the performance of our system in seeings better than 1.0". In good seeing we have acquired near diffraction-limited images; in poorer seeing the angular resolution has been routinely improved by factors of 2.5-4. The system can use guide stars as faint as I = 16 with full performance and its useful field of view is consistently larger than 40" diameter. The technique shows promise for a number of science programmes, both galactic (e. g. binary candidates, brown dwarfs, globular cluster cores) and extragalactic (e. g. quasar host galaxies, damped Lyman-alpha absorbers).

引用

页码：739 / 745

页数：7

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