Lucky Imaging: High Angular Resolution Imaging in the Visible from the Ground

Details Lucky Imaging: High Angular Resolution Imaging in the Visible from the Ground Lucky Imaging: High Angular Resolution Imaging in the Visible from the Ground

2005-07-13

arxiv.org/abs/astro-ph/0507299v1

Astron.Astrophys. 446 (2006) 739-745

Astronomy and Astrophysics

Astrophysics

7 pages, 10 figures, submitted to A&A. For further information, see http://www.ast.cam.ac.uk/~optics/Lucky_Web_Site/

Scientific paper

10.1051/0004-6361:20053695

We use a Lucky Imaging system to obtain I-band images with much improved angular resolution on a ground-based 2.5m telescope. We present results from a 10-night assessment campaign on the 2.56m 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 (eg. binary candidates, brown dwarfs, globular cluster cores) and extragalactic (eg. quasar host galaxies, damped Lyman-alpha absorbers).

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