A new-speckle interferometry system for the MAMA detector
نویسندگان
چکیده
منابع مشابه
Imaging with the MAMA Detector : Preliminary Results
We report on the first successful speckle imaging studies using the Stanford University speckle interferometry system, an instrument that uses a multianode microchannel array (MAMA) detector as the imaging device. The method of producing high-resolution images is based on the analysis of so-called “near-axis” bispectral subplanes and follows the work of Lohmann et al. (1983). In order to improv...
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Diffraction-limited images can be obtained with a large optical telescope using interferometry. One such method for objects of sufficient brightness is non-redundant masking (NRM), in which observations are made through a pupil mask that contains an array of small holes. However, NRM only uses a small fraction of the available light. Here I describe a method for Extended NRM in which a cylindri...
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Speckling is an interference effect invariably present when highly coherent light is scattered by the different elements of an optically rough surface (roughness ~ " J '" = wavelength). Speckle patterns appear everywhere in space, but interest centres on the image a nd Fourier transform planes. The lateral dime n sion of i ndiv idual speckles is determin ed by the interference of waves from the...
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We have obtained a new geometric-distortion solution for the STIS NUV-MAMA using two fields in NGC 4214 and NGC 604 which were imaged using three filters (CN182, CN270, SrF2) for GO program 9096. (WF)PC2 images of the same objects in F170W and F336W were used as an astrometric reference. Different polynomial degrees and weighting mechanisms for the geometric distortion were tested until an adeq...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1992
ISSN: 0004-6280,1538-3873
DOI: 10.1086/133078