  The Galaxy Evolution Explorer (GALEX) satellite has obtained high time
resolution ultraviolet photometry during a large flare on the M4 dwarf star GJ
3685A. Simultaneous NUV (1750 - 2800A) and FUV (1350 - 1750A) time-tagged
photometry with time resolution better than 0.1 s shows that the overall
brightness in the FUV band increased by a factor of 1000 in 200 s. Under the
assumption that the NUV emission is mostly due to a stellar continuum, and that
the FUV flux is shared equally between emission lines and continuum, then there
is evidence for two distinct flare components for this event. The first flare
type is characterized by an exponential increase in flux with little or no
increase in temperature. The other involves rapid increases in both temperature
and flux. While the decay time for the first flare component may be several
hours, the second flare event decayed over less than 1 minute, suggesting that
there was little or no confinement of the heated plasma.
