The observation and analysis of lunar occultations of stars with an emphasis on improvements to data acquisition instrumentation and reduction techniques

Details The observation and analysis of lunar occultations of stars with an emphasis on improvements to data acquisition instrumentation and reduction techniques The observation and analysis of lunar occultations of stars with an emphasis on improvements to data acquisition instrumentation and reduction techniques

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phdt........20s&link_type=abstract

Ph.D. Thesis Florida Univ., Gainesville.

Statistics

Computation

3

Astronomical Photometry, Binary Stars, Companion Stars, Data Acquisition, Data Reduction, Lunar Occultation, Space Observations (From Earth), Computer Techniques, Data Smoothing, Preprocessing

Scientific paper

A program of observation and analysis of lunar occultations was conceived, developed, and carried out using the facilities of the University of Florida's Rosemary Hill Observatory (RHO). The successful implementation of the program required investigation into several related areas. First, after an upgrade to the RHO 76-cm. reflecting telescope, a microprocessor controlled fast photoelectric data acquisition system was designed and built for the occultation data acquisition task. Second, the currently available model-fitting techniques used in the analysis of occultation observations were evaluated. A number of numerical experiments on synthesized and observational data were carried out to improve the performance of the numerical techniques. Among the numerical methods investigated were solution schemes employing partial parametric adjustment, parametric grouping into computational subsets, and preprocessing of the observational data by a number of smoothing techniques for a variety of noise conditions. Third, a turn-Key computational software system, incorporating data transfer, reduction, graphics and display, was developed to carry out all the necessary and related computational tasks in an interactive environment. Twenty-four occultation observations were obtained during the period March 1983 to March 1984. The observational data and the solutions resulting from the subsequent reductions are presented graphically and tabularly for each of the occultation events. Several angular diameter determinations were made. Among those of particular interest were 32 Librae, 1 Geminorum-B1, and X07598. The visual/spectroscopic binary 1 Geminorum was discovered to have a fourth, previously undetected, component. Two other stars, X13534 and X13607, were found to be binary with companions closer than 15 milliseconds of arc. Previously unknown faint companions were discovered for ZC1221 and ZC0126.

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