Diffraction-limited CCD imaging with faint reference stars

Details Diffraction-limited CCD imaging with faint reference stars Diffraction-limited CCD imaging with faint reference stars

2002-03-26

arxiv.org/abs/astro-ph/0203470v1

Astron.Astrophys. 387 (2002) L21

Astronomy and Astrophysics

Astrophysics

4 page letter accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20020477

By selecting short exposure images taken using a CCD with negligible readout
noise we obtained essentially diffraction-limited 810 nm images of faint
objects using nearby reference stars brighter than I=16 at a 2.56 m telescope.
The FWHM of the isoplanatic patch for the technique is found to be 50
arcseconds, providing ~20% sky coverage around suitable reference stars.

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