SIMBAD references

We present a new method, the regularized and space-variant Building Block method, which is able to reconstruct diffraction-limited aperture-synthesis images from Large Binocular Telescope (LBT) LINC-NIRVANA data. Images with the diffraction-limited resolution of a 22.8m single-dish telescope can be derived if raw images are taken at several different hour angles. We simulated computer-generated and laboratory LBT interferograms that are similar to the data which can be obtained with the LINC-NIRVANA beam combiner instrument. From the simulated data, diffraction-limited images were reconstructed with the regularized Building Block method, which is an extension of the Building Block method (Hofmann & Weigelt, 1993A&A...278..328H). We compare the Building Block reconstructions to images obtained with the Richardson-Lucy (RL) method (Richardson 1972, J. Opt. Soc. Am., 62, 55; Lucy, 1974AJ.....79..745L) and the Ordered Subsets Expectation Maximization (OSEM) method (Hudson & Larkin 1994, IEEE Trans. Med. Imag., 13, 601; Bertero & Boccacci, 2000A&AS..144..181B). Our image reconstruction studies were performed with computer-simulated J-band and laboratory H-band raw data of a galaxy with simulated total magnitudes of J=16^m to 18^m and H=16^m to 19^m, respectively. One of the faintest structures in the images has a brightness of J∼25^m. The simulated reference stars within the isoplanatic patch have magnitudes of J=20^m-21^m and H=19^m. All three methods are able to reconstruct diffraction-limited images with almost the same quality. Furthermore, raw data with space-variant point spread functions were simulated, and diffraction-limited images were reconstructed using the space-variant version of the Building Block method.