Bibcode
Beckman, J. E.; Franco, M. L.; Molaro, P.; Uladilo, G.; Crivellari, L.
Bibliographical reference
In ESA 3rd European IUE Conf. p 149-155 (SEE N83-11889 02-88)
Advertised on:
6
1982
Citations
1
Refereed citations
1
Description
Spectra of six main sequence stars with spectral types from F0 to G8
were obtained with the IUE long wavelength spectrograph at high
resolution. Four or more spectra of each object were taken over a period
of 3.5 years, supplemented by archive spectra from IUE of the same type.
Quantitative analysis of the Mg II h and k emission cores from these
spectra was performed to search for sporadic or periodic variability. No
variations the + or - 10% level set by the statistical fluctuations
within each set of spectra occur for any object. Even the limited
photometric accuracy claimed here is not guaranteed among spectra which
vary in exposure time by more than 15%. This situation for all IUE LWR
spectra can be improved only by solving the problem of background
subtraction.