A Deconvolution Technique for Hubble Space Telescope FGS Fringe Analysis

A technique has been developed for directly transforming interferometer fringe visibility functions ("S curves") from the Hubble Space Telescope (HST) fine guidance sensors (FGSs) into intensity profiles of the program object. In a process analogous to Fourier transform image deconvolution...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1992-07, Vol.104 (677), p.592-596
Main Author: Hershey, John L.
Format: Article
Language:English
Subjects:
Astronomical magnitude
Astronomy
Coordinate systems
Earth, ocean, space
Exact sciences and technology
Fourier transformations
Fringe
Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations
Hubble Space Telescope
Mathematical functions
Observation and data reduction techniques. Computer modeling and simulation
Optical filters
Quotients
S curves
Stars
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Summary:A technique has been developed for directly transforming interferometer fringe visibility functions ("S curves") from the Hubble Space Telescope (HST) fine guidance sensors (FGSs) into intensity profiles of the program object. In a process analogous to Fourier transform image deconvolution, an S curve from a double star yields a pair of narrow profiles containing information on the separation (in one coordinate), and relative brightness of the two stars. The procedure has yielded high internal precision for the separation and relative brightness in tests with HST data. Simulations indicate that it can also deconvolve S curves from multiple stars or continuous intensity distributions such as resolvable stellar or extragalactic objects. Similar deconvolution analyses may be useful in other types of interferometry.
ISSN:0004-6280
1538-3873
DOI:10.1086/133033