One -dimensional infrared speckle scans of Ross 614 AB were recorded at a wavelength
of 2.2μm. For each scan an estimate of the instantaneous quality of the seeing was
calculated and the scan was binned accordingly. The three bins corresponding to the three
best seeing conditions were further processed by applying the shift -and -add algorithm to
the set of images contained within each bin, thereby generating three shift- and -add images
with differing shift -and -add point -spread- functions. After windowing the shift -and -add
images (using edge -extension) to reduce the effect of contamination, we have obtained
parameters corresponding to the separation and brightness ratio of a two component
model of the double star Ross 614 AB by deconvolving the three shift -and -add images
with the aid of the zero-and -add technique. Least squares analysis on the positions
of the clusters of zeros found from zero- and -add yields a separation of 1.04 arcseconds
and a brightness ratio of 4.3 for the binary system at this wavelength. An extension
of the processing, which takes explicit account of the nonlinear motion of the scanning
mechanism gives improved estimates of 1.04 arcseconds and 3.9 for the separation and
brightness ratio, respectively.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/623921 |
| Date | 12 1900 |
| Creators | Davey, B. L. K., Cocke, W. J., Bates, R. H. T., McCarthy, D. W., jr., Christou, J. C., Cobb, M. L. |
| Contributors | Univ Arizona, Steward Observ |
| Publisher | Steward Observatory, The University of Arizona (Tucson, Arizona) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Article |
| Source | Steward Observatory Parker Library SO QB 4 .S752 ARCH |
| Rights | Copyright © All Rights Reserved. |
| Relation | Preprints of the Steward Observatory #850, http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1989AJ.....98.1040D&db_key=AST&data_type=HTML&format=&high=3ed65e9cd023926 |
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