Abstract
The analysis of 8 high resolution SWP spectra of the HgMn star μ Leporis obtained through the large aperture recorded by the International Ultraviolet Explorer reveals that the far ultraviolet flux of μ Leporis remained probably constant over a timescale of about 29 hr, ie. about 40% of the recently determined rotational period. One spectrum taken 10 yr before also has the same level than the average spectrum of the run. Whereas seven spectra of the 29 hr run have levels consistent with the average spectrum, one spectrum shows a lower flux by about 7% probably caused by a loss of the flux. The spectra taken with the LWP camera consistently show that the mid-UV flux remained stable over the 29 hr run. Hence the available IUE data do not show evidence of real flux variations in the ultraviolet range for μ Leporis.
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