... Ultraviolet observations of the hot R CrB star, V348 Sgr, during a deep minimum. ... We obtained three high-quality ultraviolet spectra of the hot R Coronae Borealis ...
... Intensity enhancement of O VI ultraviolet emission lines in solar spectra due to opacity. ... O VI in several regions obtained with the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) instrument on board the ...
... and can only be observed in the ultraviolet, where its radial velocity amplitude and ... of the orbit from a new ultraviolet light curve and previous radial velocities ... from multiwavelength photometry and from high-resolution ultraviolet spectra ...
... The exceptional in-orbit performance of the International Ultraviolet Explorer (IUE) for more than eighteen years has made it possible to accumulate an invaluable database of ultraviolet observations of a wide variety of objects and, in particular of ...
... J.R. Thorstensen and P.B. Byrne New ultraviolet (UV) observations of latetype stars ... The International Ultraviolet Expoloer (IUE) spectrum show a composite of a white ...
... were made using optical and infra-red broad-band photometry, ultraviolet and optical spectroscopy and microwave monitoring ... One of the flares, observed in optical photometry and ultraviolet spectroscopy is one of the most energetic ever observed on ...
... We performed a study of 104 RS CVn systems in the extreme ultraviolet (EUV) using the all--sky survey data obtained by the Extreme Ultraviolet Explorer (EUVE). ...
... We present optical, ultraviolet (UV) and extreme ultraviolet (EUV) results for a new active late-type dwarf star discovered by the Extreme Ultraviolet Explorer (EUVE). ...
... This analysis was based on observational data from the spectral range 100A to 3000A obtained as a result of three separate satellite missions, i.e. Hubble Space Telescope, International Ultraviolet Explorer and the Extreme Ultraviolet Explorer. ...