• Citations Per Year
Learn More
We present the serendipitous detection of an extreme-ultraviolet flare on EUVE J0613 23.9B. The flare showed over a 200-fold increase above the quiescent emission in the DS/Lexan 60–200 Å wavelength band. Optical spectroscopy revealed that the event was associated with an active dM3.5e star. The EUVE spectra are dominated by emission lines formed at(More)
The first comprehensive sky survey of the extreme ultraviolet (EUV) spectral range performed by the Extreme Ultraviolet Explorer (EUVE) has uncovered a handful of very bright sources at wavelengths longer than the He I 504 angstroms photoionization edge. Among these objects are four white dwarfs with exceptionally low interstellar medium (ISM) column(More)
We present far-UV and UV spectroscopic observations of Proxima Centauri obtained as part of our continued investigation into the optically thin approximation assumed for the transition regions of late-type stars. Significant opacity is found in the C iii lines during both the quiescent and flaring states of Proxima Cen, with up to 70% of the expected flux(More)
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). A large are with an energy in excess of 10 35 erg and duration of 1.1 days was detected in the EUVE Lex/B band (60{200 A). The energetics of the event indicate that radiative losses in the(More)
  • 1