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UV Observations of Three LMC Be-Star/X-ray Binaries
Hauschildt, P. H.; Cowley, A. P.; Schmidtke, P. C. +4 more
This paper describes IUE ultraviolet observations of three Be-star/X-ray binaries in the LMC: CAL 9, CAL E, and RX J0520.5-6932. Because the optical spectra show evidence of an overlying continuum source, ultraviolet spectra were obtained to further investigate its properties, but no UV emission lines are found. The UV spectra have been compared t…
Camera Artifacts in IUE High-Dispersion Spectra
Crenshaw, D. Michael; Bruegman, Ottow W.; Johnson, Rita +1 more
Sky-background images obtianed with the International Ultraviolet Explorer (IUE) have been analyzed to identify camera artifacts in high-dispersion point-source spectra observed through the large aperture. The camera artifacts are artificial emission features that are apparent in all IUE spectra with exposure times longer than about one hour. The …